Iron Sentence Examples
From a bar of iron he made four horseshoes.
Getting the iron hot was no easy feat.
Her hand fell from the lever that opened the heavy iron door.
The windows were open with no glass, and heavy iron chandeliers hung from thick wooden rafters and were burning real candles.
The iron wall was open in front of Sirian's cell.
Butter is the principal export, and petroleum, coal and iron the imports.
What Cardiff lacks is a corresponding import trade, for its imports in 1906 amounted to only 2,108,133 tons, of which the chief items were iron ore (8 9 5,610 tons), pit-wood (303,407), grain and flour (298,197).
Vara hurried to close the iron door while Hilden rushed to the cell holding Memon.
Limestone, iron and coal are also found.
Iron is mainly mined in Elba.
AdvertisementThe Coptic patriarch uses an iron cross-staff.
Iron, worked by the tribe of the Kouis, is found in the mountainous region.
She tried to step around him, but he stopped her with an iron grip on her arm.
The iron mills are almost all in the vicinity of Wheeling.
Immediately outside the city limits in 1905 there were many large manufactories, including the repair shops of the Southern railroad; iron and steel, car wheels and cotton-oil were among the products of the suburban factories.
AdvertisementIn this case both collars of cast iron are loose.
This iron is considered by several of the first authorities"on the subject to be of meteoric origin,' but no evidence hitherto given seems to prove decisively that it cannot be telluric. That the nodules found were lying on gneissic rock, with no basaltic rocks in the neighbourhood, does not prove that the iron may not originate from basalt, for the nodules may have been transported by the glaciers, like other erratic blocks, and will stand erosion much longer than the basalt, which may long ago have disappeared.
This iron seems, however, in several respects to be unlike the celebrated large nodules of iron found by Nordenskiold at Ovifak, but appears to resemble much more closely the softer kind of iron nodules found by Steenstrup in the basalt;' it stands exposure to the air equally well, and has similar Widmannstaten figures very sharp, as is to be expected in such a large mass.
Coal was brought down from the hills on the backs of mules, and iron carried in two-ton wagons.
The commercial greatness of Cardiff is due to the vast coal and iron deposits of the country drained by the Taff and Rhymney, between whose outlets the town is situated.
AdvertisementThe total exports of the Cardiff docks in 1906 amounted to 8,767,502 tons, of which 8, 433, 629 tons were coal, coke and patent fuel, 151,912 were iron and steel and their manufactures, and 181,076 tons of general merchandise.
In 1888 the Dowlais Iron Company (now Messrs Guest, Keen & Nettlefold, Ltd.) acquired here some ninety acres on which were built four blast furnaces and six Siemens' smelting furnaces.
Minnesota ranked first among the states in 1902 in the production of iron ore.
Since that date the development of iron mining in Minnesota has been remarkable, and the increase both in volume and value of the output has been practically uninterrupted.
The putrefaction of the latter sets free sulphuretted hydrogen, which then acts on the iron compounds, precipitating ferrous sulphide.
AdvertisementZinc is commonly deposited by electrolysis on iron or steel goods which would ordinarily be "galvanized," but which for any reason may not conveniently be treated by the method of immersion in fused zinc. The zinc cyanide bath may be used for small objects, but for heavy goods the sulphate bath is employed.
She tugged the heavy door open by its old iron handle and gazed into a large square of grass, a courtyard, around which many similar rooms with heavy doors were arranged.
Lowering the heavy cast iron frying pan into the sink, she filled it with water and left it to soak.
She put the last of the dishes in the dishwasher and ran water in the sink to wash the iron skillet and wooden handled spatula.
A large number of cotton mills furnish the chief source of industry; printing, dyeing and bleaching of cotton and calico, spinning and weaving machine making, iron and steel works, and collieries in the neighbourhood, are also important.
The industries of the town include manufactures of cotton, silk, earthenware, machinery and tobacco, with brass and iron founding; while slate and stone are quarried, and there are coal, iron and lead mines in the neighbourhood.
Birmingham, situated in an immensely rich iron, coal and limestone region, is the principal manufacturing centre in the state, and the most important centre for the production and manufacture of iron in the southern states.
In Jefferson county there were in 1900 more than 300 mining and manufacturing establishments, engaged, chiefly, in the production of iron, coal and coke, and a majority of these are in Birmingham and its suburban towns.
These natural advantages make possible the production of pig iron at an unusually low cost.
In 1900 the Birmingham district produced six-sevenths of the total pig iron exported from the United States, and in 1902 nine-tenths of Alabama's coal, coke and pig iron; in 1905 Jefferson county produced 67.5% of the total iron and steel product of the state, and 62.5% of the pig iron produced by the state.
Iron and coal are probably abundant, and silverlead, copper and antimony are believed to exist.
Deposits of copper, tin, iron and tungsten have been discovered, and a variety of other mineral products (graphite, mica, spodumene, coal, petroleum, &c.).
They usually take the form of cast iron open stoves fitted with a number of Bunsen burners which heat perforated lumps of asbestos.
The materials mixed with the iron borings cause them to rust into a solid mass, and in doing so a slight expansion takes place.
Suitable proportions of materials to form a rust joint are 90 parts by weight of iron borings well mixed with 2 parts of flowers of sulphur, and I part of powdered sal-ammoniac. Another joint, less rigid but sound and durable, is made with yarn and white and red lead.
With wrought iron pipes bends may be arranged, as shown in fig.
Direct radiators are a development of the early coil of pipe; they are made in various types and designs and are usually of cast iron.
A notable feature of modern boiler construction is the mode of building the apparatus of cast iron in either horizontal or vertical sections.
Should a defect occur with a wrought iron boiler it is usually necessary for the purpose of repair to disconnect and remove the whole apparatus, the heating system of which it forms a part being in the meantime useless.
A water pipe of copper or wrought iron is passed through a cylinder in which gas or oil heating burners are placed.
The first puddling works were opened in 1839, and Troy was long the centre of the New York iron and steel industry; in 1865 the second Bessemer steel works in the United States were opened here.
The import trade shows the largest totals in foodstuffs, wines and liquors, textiles and raw materials for their manufacture, wood and its manufactures, iron and its manufactures, paper and cardboard, glass and ceramic wares.
Coal.The principal mines of France are coal and iron mines.
Iron.The iron-mines of France are more numerous than its coalmines, but they do not yield a sufficient quantity of ore for the needs of the metallurgical industries of the country; as will be seen in the table below the production of iron in France gradually increased during the 19th century; on the other hand, a decline in prices operated against a correspondingly marked increase in its annual value.
Metallurgy.The average production and value of iron and steel manufactured in France in the last four decades of the I 9th century is shown below Cast Iron.
Their produce has gradually decreased since the 17th century, and is now unimportant, but sulphate of copper, iron pyrites, and some gold, silver, sulphur and sulphuric acid, and red ochre are also produced.
The company also owns iron mines, limestone and quartz quarries, large iron-works at Domnarfvet and elsewhere, a great extent of forests and saw-mills, and besides the output of the copper mines it produces manufactured iron and steel, timber, wood-pulp, bricks and charcoal.
Here are iron, machinery and brick works, tanneries, distilleries, and factories for jam, mustard and mead.
Within the city the principal streets have been roughly paved, and iron bars placed across the narrow alleys to prevent the passage of camels.
Thenard in 1808 by heating boron trioxide with potassium, in an iron tube.
Hausmann in 1813, alludes to the arsenic and iron present (cfipµ.aKov, poison, and aLo pos, iron).
Iron is distributed throughout Australia, but for want of capital for developing the fields this industry has not progressed.
In New South Wales there are, together with coal and limestone Iron.
The most extensive fields are in the Mittagong, Wallerawang and Rylstone districts, which are roughly estimated to contain in the aggregate 12,944,000 tons of ore, containing 5,853,000 tons of metallic iron.
Magnetite, or magnetic iron, the richest of all iron ores, is found in abundance near Wallerawang in New South Wales.
Wolfram (tungstate of iron and manganese) occurs in some of the states, notably in New South Wales, Victoria, Tasmania and Queensland.
Iron, coal and slate are the chief products, and copper and cobalt may be added.
Woolwich remained the chief dockyard of the English navy until the introduction of iron ship building, but the dockyard was closed in 1869.
The two first of these three are handsome suspension bridges; the third, an iron structure, replaced a wooden bridge of many arches which was closed in 1881, after standing a little over a century.
When feudal possessions, instead of being purely personal, were vested in the families of the holder after the death of Charlemagne, Tournai was specially assigned to Baldwin of the Iron Arm by [[Charles (disambiguation)|Charles Knights Jousting With Cronells On Tt-Tfir Lances]].
Gothite occurs with other iron oxides, especially limonite and hematite, and when found in sufficient quantity is mined with these as an ore of iron.
The houses, built of stone and whitewashed, are square, substantial, flat-topped buildings, presenting to the street bare walls, with a few slits protected by iron gratings in place of windows.
In 1826 he described the prismatically-coloured films of metal, known as Nobili's' rings, deposited electrolytically from solutions of lead and other salts when the anode is a polished iron plate and the cathode is a fine wire placed vertically above it.
Others, like the Ambrosiusbrunnen and the Karolinenbrunnen, are among the strongest iron waters in the world, while the Rudolfsbrunnen is an earthy-alkaline spring.
Besides the mineral water baths there are also moor or mud-baths, and the peat used for these baths is the richest in iron in the world.
The terrigenous deposits consist of blue muds, red muds (abundant along the coast of Brazil, where the amount of organic matter present is insufficient to reduce the iron in the matter brought down by the great rivers to produce blue muds), green muds and sands, and volcanic and coral detritus.
It has iron foundries, machinery factories, railway workshops and a considerable trade in cattle, and among its other industries are weaving and malting and the manufacture of cloth.
With an apparatus similar to the above, but smaller, made of iron and filled with mercury, Joule obtained results varying from 772.814 foot-pounds when driving weights of about 58 lb were employed to 775.352 foot-pounds when the driving weights were only about 192 lb.
By ca-sing two conical surfaces of cast-iron immersed in mercury and contained in an iron vessel to rub against one another when pressed together by a lever, Joule obtained 776.045 foot-pounds for the mechanical equivalent of heat when the heavy weights were used, and 774.93 foot-pounds with the small driving weights.
Iron, coal, copper and manganese are mined.
Municipal ownership has been further developed in Cleveland than in any other large city in the United States, chiefly because of the advocacy of Tom Loftin Johnson (born 1854), a street-railway owner, iron manufacturer, an ardent single-taxer, who was elected mayor of the city in 1901, 1903, 1905 and 1907.
Cleveland's rapid growth both as a commercial and as a manufacturing city is due largely to its situation between the iron regions of Lake Superior and the coal and oil regions of Pennsylvania and Ohio.
Although the iron ranges in the north-east had been explored about 1860 and were known to contain a great wealth of ore, it was not until 1884 that mining was actually begun on the Vermilion Range.
Eight years later (1892) the much richer Mesabi Range, the most productive iron range in the world, was opened up; it soon surpassed the Vermilion in its output, and by 1902 the product was nearly ten times greater.
Iron shipments from the Mesabi and Vermilion ranges, cereals from the Northwest, fruits and vegetables from the Pacific coast, and Oriental products obtained via the great northern railways, are also elements of great importance in the state's commerce.
An important nucleo-proteid is haemoglobulin or haemoglobin, the colouring matter of the red blood corpuscles of vertebrates; a related substance, haemocyanin, in which the iron of haemoglobin is replaced by copper, occurs in the blood of cephalopods and crayfish.
Round the waist over the tunic was worn a leathern girdle having a broad iron buckle damascened with silver.
From the girdle hung the single-edged missile axe or francisca, the scramasax or short knife, a poniard and such articles of toilet as scissors, a comb (of wood or bone), &c. The Franks also used a weapon called the framea (an iron lance set firmly in a wooden shaft), and bows and arrows.
They protected themselves in battle with a large wooden or wicker shield, the centre of which was ornamented with an iron boss (umbo).
Few obsidians are entirely vitreous; usually they have small crystals of felspar, quartz, biotite or iron oxides, and when these are numerous the rock is called a porphyritic obsidian (or hyalo-liparite).
It is a centre of the iron and steel industries, producing principally cast steel, cast iron, iron pipes, wire and wire ropes, and lamps, with tin and zinc works, coal-mining, factories for carpets, calcium carbide and paper-roofing, brickworks and breweries.
The manufactures include tobacco, and iron and steel goods.
The coagulum is next flattened out by a wooden or iron roller to get rid of the cavities containing watery liquid, and the sheets are then hung up for fourteen days to dry, when they weigh about 2 lb, the sheets being usually z to a in.
To convert the masticated rubber into rectangular blocks, it is first softened by heat, and then forced into iron boxes or moulds.
The principal industries are the iron and metal manufactures, chiefly centred at Steyr.
The principal articles of export are salt, stone, timber, live-stock, woollen and iron wares and paper.
The vats for depositing may be of enamelled iron, slate, glazed earthenware, glass, lead-lined wood, &c. The current densities and potential differences frequently used for some of the commoner metals are given in the following table, taken from M ` Millan's Treatise on Electrometallurgy.
The strength of the current may also be regulated by introducing lengths of German silver or iron wire, carbon rod, or other inferior conductors in the path of the current, and a series of such resistances should always be provided close to the tanks.
Iron ships' plates have recently been coated with copper in sections (to prevent the adhesion of barnacles), by building up a temporary trough against the side of the ship, making the thoroughly cleansed plate act both as cathode and as one side of the trough.
For this reason the acid copper-bath is not used for iron or zinc objects, a bath containing copper cyanide or oxide dissolved in potassium cyanide being substituted.
If a wire of soft iron is substituted for the suspended magnetic needle, either pole of the bar-magnet will attract either end of the wire indifferently.
It is splendid to feel the wind blowing in my face and the springy motion of my iron steed.
The various shades of the sand are singularly rich and agreeable, embracing the different iron colors, brown, gray, yellowish, and reddish.
The materials required are iron borings, sal-ammoniac and sulphur; these are mixed together, moistened with water, and rammed into the socket, which is previously half filled with yarn, well caulked.
With cast iron pipe this cannot be done, and no length of piping over 40 ft.
A circle of stones in the Iron Market of Linkoping marks the spot where Sigismund's adherents were beheaded in 1600.
The bark, very dark externally, is an excellent tanning substance; the inner layers form the quercitron of commerce, used by dyers for communicating to fabrics various tints of yellow, and, with iron salts, yielding a series of brown and drab hues; the colouring property depends on a crystalline principle called quercitrin, of which it should contain about 8%.
The revolving part is made with two side frames of cast iron or steel plates, and to these the lifting gear is attached.
Copper and lead are found in several parts of the Aravalli range and of the minor ridges in Alwar and Shaikhawati, and iron ores abound in several states.
The contracts naturally do not concern such criminal cases as the above, as a rule, but marriage contracts do specify death by strangling, drowning, precipitation from a tower or pinnacle of the temple or by the iron sword for a wife's repudiation of her husband.
The celebrated iron ore of Elba is of Tertiary age and occurs indifferently in all the older rocks.
Copper is not yet universally employed, price being the governing factor in its employment; moreover, the conducting quality of the iron used for telegraphic purposes has of late years been very greatly improved.
A coarse screw-thread is formed in the upper part of the inner cup, and this screws on to the end of the iron bolt by which it is supported.
Between a shoulder, a, in the iron bolt and a shoulder in the porcelain cup, c, is placed an indiarubber ring, which forms a yielding washer and enables the cup to be screwed firmly to the bolt, while preventing FIG.
The weight of the iron sheath varies greatly according to the depth of the water, the nature of the sea bottom, the prevalence of currents, and so on.
The insulation is again tested, and if no fault is discovered the served core is passed through the sheathing machine, and the iron sheath and the outer covering are laid on.
This liability is overcome by making such movable parts as require to be magnetic of soft iron, and magnetizing them by the inducing action of a strong permanent magnet.
The needle (in the modern pattern) is of soft iron, and is kept magnetized in ductively by the action of two permanent steel magnets.
The arm which moves round over the segments rotates at the rate of three revolutions per second, and is kept in motion by means of an iron toothed wheel, the rim of which is set in close proximity to the poles of an electromagnet.
The electromagnet consists of two coils, each wound on a soft iron core fixed to the poles of a strong permanent horse-shoe magnet.
One of the longest circuits upon which it has been successfully worked is that between St Petersburg and Omsk, a distance of approximately 2400 miles of iron wire, with three repeating stations.
The signal coil is suspended by fibres and is mounted together with a fixed soft iron core on a brass plate affixed to a rack, with which a pinion operated by a milled head screw engages.
The use of the iron core renders it possible to produce a high inductive effect with a low resistance coil.
This consists of a low resistance coil of copper wire enclosed in a laminated iron circuit similar to the magnetic shunt already de Magnetic scribed.
To the sending currents, however, the bridge offers only apparent ohmic resistance due to the fact that the current entering the mid-point of the winding flows through the two halves or arms in opposite direction, and, owing to the winding being on the same iron core, the mutual inductive effect of the two arms on one another neutralizes the self-induction to the sending currents.
He constructed one form of his coherer of a glass tube a few inches long filled with iron borings or brass filings, having contact plates or pins at the end.
The next class of wave or oscillation detector is the magnetic detector depending upon the power of electric oscillations to affect the magnetic state of iron.
In this last form an endless band of hard iron wires passes slowly round two wooden pulleys driven by clockwork.
A pair of fine wires of iron and constantan are twisted together in the middle, and one pair of unlike ends are connected to a galvanometer.
A highly insulated tube contains a little mercury, which is used as a negative electrode, and the tube also has sealed through the glass a platinum wire carrying an iron plate as an anode.
A battery with a sufficient number of cells is connected to these two electrodes so as to pass a current through the mercury vapour, negative electricity proceeding from the mercury cathode to the iron anode.
Helmond is one of the industrial centres of the province, and possesses over a score of factories for cotton and silk weaving, cotton printing, dyeing, iron founding, brewing, soap boiling and tobacco dressing, as well as engine works and a margarine factory.
The mines near the city are very productive, and thousands of men and beasts are employed in transporting lead, iron, copper, zinc and sulphur to the coast.
Vessels go to Porman to land coke and coal, and to load iron ore and lead.
The metal is usually obtained from the flue-dust (produced during the first three or four hours working of a zinc distillation) which is collected in the sheet iron cones or adapters of the zinc retorts.
This is mixed with small coal, and when redistilled gives an enriched dust, and by repeating the process and distilling from cast iron retorts the metal is obtained.
In suburban and rural districts subscribers are usually served by means of bare wires erected upon wooden or iron poles.
When a number of cables follow the same route, they are generally laid in conduits made up of earthenware or cement ducts; iron pipes are used when the number of cables is small.
In one system the main cables terminate in large airtight iron boxes placed in the manholes.
Another method of distribution, largely adopted, is to run the lead cables into the interior of blocks of buildings, and to terminate them there in iron boxes from which the circuits are distributed to the surrounding buildings by means of rubber-covered wires run along the walls.
In his last illness he was cauterized, and on seeing the burning iron he addressed "brother Fire," reminding him how he had always loved him and asking him to deal kindly with him.
With Edward Cooper (son of Peter Cooper, whom Hewitt greatly assisted in organizing Cooper Union, and whose daughter he married) he went into the manufacture of iron girders and beams under the firm name of Cooper, Hewitt & Co.
Others, such as Paros, are mainly composed of marble, and iron ore occurs in some.
The chief minerals are sulphur, in the production of which Italy holds one of the first places, iron, zinc, lead; these, and, to a smaller extent, copper of an inferior quality, manganese and antimony, are successfully mined.
Very little pig iron is tries US made, most of the iron ore being exported, and iron manufactured consists of old iron resmelted.
For steelmaking foreign pig iron is chiefly used.
In 1894 the excess of imports over exports fell to 2,720,000, but by 1898 it had grown to 8,391,000, in consequence chiefly of the increased importation of coal, raw cotton and cotton thread, pig and cast iron, old iron, grease and oil-seeds for use in Italian industries.
After this event Heribert, the archbishop of..Milan, invited Conrad, the Franconian king of Germany, into Italy, and crowned him with the iron crown of the kingdom.
In August there were strikes among the dock laborers of Genoa and the iron workers of Florence; the latter agitation developed into a general strike in that city, which aroused widespread indignation among the orderly part of the population and ended without any definite result.
Asparagus, figs, and wine of medium quality are grown in the district; and heavy iron goods, chemical products, clocks and plaster are among the manufactures.
Near Tokat copper pyrites, with iron and manganese, kaolin and coal are found; but most of the copper worked here comes from the mines of Keban Maden and Arghana Maden, on the upper Euphrates and Tigris.
The main industries are cotton-spinning, flax-spinning, cottonprinting, tanning and sugar refining; in addition to which there are iron and copper foundries, machine-building works, breweries and factories of soap, paper, tobacco, &c. As a trading centre the city is even more important.
It is mentioned so early as the 7th century and in 868 Baldwin of the Iron Arm, first count of Flanders, who had been entrusted by Charles the Bald with the defence of the northern marches, built a castle here against the Normans raiding up the Scheldt.
Saturn for lead, Venus for copper, and Mars for iron, and the belief that the colours of flowers ' The Egyptians believed that the medicinal virtues of plants were due to the spirits who dwelt within them.
In the 6th century Alexander of Tralles used colchicum for gout, iron for anaemia, and rhubarb in liver weakness and dysentery.
Molybdenum occurs in nature chiefly as the minerals molybdenite (MoS 2) and wulfenite (PbMo04), and more rarely as molybdic ochre (Moos) and ilsemannite; it also occurs in many iron ores.
The Eastern railway has works at Romilly, and there are iron works at Clairvaux and wire-drawing works at Plaines; but owing to the absence of coal and iron mines, metal working is of small importance.
Nuclein is a complex albuminoid substance containing phosphorus and iron in organic combination (Macallum).
Columbus is near the Ohio coal and iron-fields, and has an extensive trade in coal, but its largest industrial interests are in manufactures, among which the more important are foundry and machine-shop products (1905 value, $6,259,579); boots and shoes (1905 value, $5,425,087, being more than one-sixtieth of the total product value of the boot and shoe industry in the United States, and being an increase from $359,000 in 1890); patent medicines and compounds (1905 value, $3,214,096); carriages and wagons (1905 value, $2,197,960); malt liquors (1905 value, $2,133,955); iron and steel; regalia and society emblems; steam-railway cars, construction and repairing; and oleo-margarine.
Its cloth and silk manufactures are important, and owing to the opening up of extensive coalfields in the district almost every branch of iron industry is carried on.
The exterior is adorned with niched statues and beautiful iron trellis work round the windows.
It stands near the border of Victoria, on the right bank of the Murray river, here crossed by two bridges, one built of wood carrying a road, the other of iron bearing the railway.
He was finally routed at Temesvar by the combined forces of Janos Zapolya and Istvan Bathory, was captured, and condemned to sit on a red-hot iron throne, with a red-hot iron crown on his head and a red-hot sceptre in his hand.
Eveleth is served by the Duluth, Missabe & Northern and the Duluth & Iron Range railways.
The city is a trade centre for a rich farming district, has car-shops (of the Pere Marquette railway) and iron foundries, and manufactures wagons, pottery, furniture and clothing.
Among its manufactures are earthenware, tobacco, vinegar, flour, farm-gates (iron), sash and doors, marble and granite monuments, carriages and bricks.
Iron, zinc and lead are found in the vicinity, and some coal is mined.
The iron formation is widely spread.
Its industries embrace the manufacture of iron and steel goods, tanning and organ-building.
The main shaft bearings are in two sets and composed of steel balls running in steel cones and cups; the governor is an iron rod about 16 in.
It consists of a large stone chamber which communicates directly with two slightly slanting tubular retorts of iron.
The pyrites is subjected to dry distillation from out of iron or fire-clay tubular retorts at a bright red heat.
The principal manufactures are firearms, ironmongery, earthenware, woollen cloth, beer, stoneware, zinc goods, colours and salt; in the neighbourhood are iron and coal mines.
Among other important manufactures are foundry and machine shop products ($6,944,392 in 1905); flour and grist-mill products ($4,428,664); cars and shop construction and repairs by steam railways ($2,502,789); saws; waggons and carriages ($2,049,207); printing and publishing (book and job, $1,572,688; and newspapers and periodicals, $2,715,666); starch; cotton and woollen goods; furniture ($2,528,238); canned goods ($1,693,818); lumber and timber ($1,556,466); structural iron work ($1,541,732); beer ($1,300,764); and planing-mill products, sash, doors and blinds ($1,111,264).
Pop. (1906) 9749 It possesses iron mines and is the centre of the coal-fields of the Aveyron, which supply the ironworks established by the Duc Decazes, minister of Louis Xviii.
Iron - haematite - is present almost everywhere.
In the i 1 th century this new form of devotion was extolled by some of the most ardent reformers in the monastic houses of the west, such as Abbot Popon of Stavelot, St Dominic Loricatus (so called from his practice of wearing next his skin an iron lorica, or cuirass of thongs), and especially Cardinal Pietro Damiani.
The penance lasted 332 days, during which they flogged themselves with thongs fitted with four iron points.
The Finland rappa-kivi, the Serdobol gneiss, and the Pargas and Rustiala marble (with the so-called Eozoon canadense) yield good building stone; while iron, copper and zinc-ore are common in Finland and in the Urals.
As a producer of iron Russia nevertheless runs France neck and neck for the fourth place amongst the iron-producing countries of the world, her annual output having increased from 1,004,800 metric tons in 1891 to 2,808,000 in 1901 and to 2,900,000 in 1904.
The amount of iron and steel produced in the Urals is not quite 20% of the total in all European Russia and Poland.
Out of an average of some 2,700,000 tons of pig-iron produced annually in the whole of the Russian empire, 61.5% is produced in the basin of the Donets, and out of an average of 2,160,500 tons of worked iron and steel 48.7% are prepared in the same region.
Thus, while one village would produce nothing but felt shoes, another would carve sacred images (ikons), and a third spin flax only, a fourth make wooden spoons, a fifth nails, a sixth iron chains, and so on.
Machinery, coal, iron, woollens, ships, lead and copper are the commodities supplied by the United Kingdom.
In time it became a common practice to cover them with a thin sheathing or plating of iron, in order to add to their life; this expedient caused more wear on the wooden rollers of the wagons, and, apparently towards the middle of the 18th century, led to the introduction of iron wheels, the use of which is recorded on a wooden railway near Bath in 1734.
But the iron sheathing was not strong enough to resist buckling under the passage of the loaded wagons, and to remedy this defect the plan, was tried of making the rails wholly of iron.
In 1767 the Colebrookdale Iron Works cast a batch of iron rails or plates, each 3 ft.
In most parts of England the plate-rail was preferred, and it was used on the Surrey iron railway, from Wandsworth to Croydon, which, sanctioned by parliament in 1801, was finished in 1803, and was the first railway available to the public on payment of tolls, previous lines having all been private and reserved exclusively for the use of their owners.
In South Wales again, where in 1811 the railways in connexion with canals, collieries and iron and copper works had a total length of nearly 150 miles, the plate-way was almost universal.
By making them in longer lengths a reduction was effected in the number of joints - always the weakest part of the line; and another advance consisted in the substitution of wrought iron for cast iron, though that material did not gain wide adoption until after the patent for an improved method of rolling rails granted in 1820 to John Birkinshaw, of the Bedlington Ironworks, Durham.
The next important development in rail design originated in America, which, for the few lines that had been laid up to 1830, remained content with wooden bars faced with iron.
There was a waste of metal in these early rails owing to the excessive thickness of the vertical web, and subsequent improvements have consisted in adjusting the dimensions so as to combine strength with economy of metal, as well as in the substitution of steel for wrought iron (after the introduction of the Bessemer process) and in minute attention to the composition of the steel employed.
The joint was thus suspended between the two chairs, and two keys of iron, called " fishes," fitting the side channels of the rails, were driven in on each side between the chairs and the rails.
The iron tramway or railway had been known for half a century and had come into considerable use in connexion with collieries and quarries before it was realized that for the carriage FIG.
Its general character was such that cattle could not stand on it, and a piece of iron would sink in it.
Larger rivers, canals, roads, other railways and sometimes deep narrow valleys are crossed by bridges (q.v.) of timber, brick, stone, wrought iron or steel, and many of these structures rank among the largest engineering works in the world.
These are flat bars of iron or steel from 18 in.
The substitution of steel for iron as the material for rails which made possible the axle loads and the speeds of Lto-day, and, by reducing the cost of maintenance, contributed enormously to the economic efficiency of railways, was one of the most important events in the history of railways, and a scarcely less important element of progressive economy has been the continued improvement of the steel rail in stiffness of section and in toughness and hardness of material.
Where the depth to rail-level was too great for cut-and-cover methods, ordinary tunnelling processes were used; and where the trench was too shallow for the arched roof, heavy girders, sometimes of cast iron, bridged it between the side walls, longitudinal.
The first actual work, however, was not begun till 1870, when the construction of an iron structure on a single row of columns was undertaken.
The simplicity is great; they can be quickly mounted and dismounted; the correct gauge can be perfectly maintained; the sections of rails and sleepers (which are of iron) are very portable, and skilled labour is not required to lay or to take them up; the making of a " turn-out " is easy, by taking out a 15 ft.
The houses, mostly white with coloured roofs, are generally built of wood and iron, and have glazed porches, gay with fuchsias and pelargoniums. Government House, grey, stone-built and slated, calls to mind a manse in Shetland or Orkney.
It has an increasing trade in iron, timber, coal and agricultural products, a trade which is fostered by a harbour opened in 1897; and also large factories for making aniline dyes and soda.
Other industries are the manufacture of cellulose, artificial manure, flour and malt; and there are saw-mills, iron foundries and breweries in the town.
We might at first suppose that the sun was really an intensely heated body radiating out its heat as does white-hot iron, but this explanation cannot be admitted, for there is no historical evidence that the sun is growing colder.
The principal mining product is mercury, extracted at Idria, while iron and copper ore, zinc and coal are also found.
Near the town are iron mines and quarries of limestone, and on the neighbouring mountains are forests containing valuable hardwood timber.
Recent experiments lead to the conclusion that iron, lead, manganese, lignite and sulphur exist in considerable abundance.
The use of iron for arms and implements now finally triumphed over bronze.
The town possesses breweries, tanneries, malthouses, flour-mills, saw-mills, brick and tile works, potteries and an iron foundry; its trade in butter is considerable.
This is described as having "an head about a quarter of a yard long, a staffe of two yards long put into their head, twelve iron pikes round about, and one in the end to stop with."
Its materials are pebbles, clays and sands of various' colours from white to deep red, tinged with peroxide of iron, which sometimes cements the pebbles and sands into compact rocks.
The state contains deposits of iron, gypsum, marl, phosphate, lignite, ochre, glass-sand, tripoli, fuller's earth, limestones and sandstones; and there are small gas flows in the Yazoo Delta.
The lack of mineral resources, especially of coal and iron, of a good harbour (until the improvement of Gulfport), and of an adequate supply of labour has discouraged most kinds of manufacturing.
It was along the coast of North Carolina that Europeans in 1585 made the first discovery of iron ore within the present limits of the United States.
Iron ores are widely distributed within the state, and there have been times since the eve of the War of Independence when the mining of it was an industry of relatively great importance.
Niriz was formerly known for its manufacture of steel from iron ore brought from Parpa, 40 m.
There are many rich deposits of iron ores in the state, but they only produce a small quantity of charcoal iron for local consumption.
Ashland has an excellent harbour, has large iron-ore and coal docks, and is the principal port for the shipment of iron ore from the rich Gogebec Range, the annual ore shipment approximating 3,500,000 tons, valued at $12,000,000, and it has also an extensive export trade in lumber.
Ashland has large saw-mills, iron and steel rolling mills, foundries and machine shops, railway repair shops (of the Chicago & NorthWestern railway), knitting works, and manufactories of dynamite, sulphite fibre, charcoal and wood-alcohol.
Dereham is an important agricultural centre with works for the manufacture of agricultural implements, iron foundries and a malting industry.
Among the city's manufactures are oxide of tin and other chemicals, iron and steel, leather goods, automobiles and bicycles, electrical and telephone supplies, butted tubing, gas engines, screws and bolts, silk, lace and hosiery.
In the van Ruymbeke process the spent lyes are allowed to settle, and then treated with "persulphate of iron," the exact composition of which is a trade secret, but it is possibly a mixture of ferric and ferrous sulphates.
Ferric hydrate, iron soaps and all insoluble impurities are precipitated.
The liquid is filterpressed, and any excess of iron in the filtrate is precipitated by the careful addition of caustic soda and then removed.
The chief industries are weaving, leather-making, dyeing and working in iron and pottery.
It is an oxide of iron having the formula Fe 3 O 4, corresponding with 72.4% of metal, whence its great value as an ore.
It may be regarded as a ferroso-ferric oxide, FeO.Fe 2 O 3, or as iron ferrate, Fe"Fe 2 '0 4.
Iron rust sometimes contains magnetite.
It contains an asylum maintained by the provincial government; also saw and grist mills and iron foundries.
Other industries are brewing, printing and iron-founding, and there are ochre and iron mines in the neighbourhood.
Columbus is situated in a fine farming region, and has extensive tanneries, threshingmachine and traction and automobile engine works, structural iron works, tool and machine shops, canneries and furniture factories.
The country has a great wealth of minerals, silver having been found, and copper, lead, iron, coal and rock-salt being wrought with profit.
The leading industries comprise manufactures of tweeds, hosiery, clogs, baskets and leather, besides the timber trade, nursery gardening and the making of machinery and iron implements.
Small quantities of quicksilver, sulphur and iron are obtained.
There are soap and flour mills and metallurgic factories in the town, and iron, copper and lead mines in the neighbouring Sierra de Almenara.
The manufactures of Derbyshire are both numerous and important, embracing silks, cotton hosiery, iron, woollen manufactures, lace, elastic web and brewing.
Iron has also been produced in Derbyshire from an early date, and coal mines were worked at Norton and Alfreton in the beginning of the 14th century.
There are large iron and steel works here, notably the Tredegar Iron Works.
During the war the principal iron foundry of the Confederacy (Tredegar Iron Works) was in Richmond, and here most of the cannon used by the Confederate armies were cast.
Cart-wheels were sometimes bound with iron, of which he greatly approves.
The Blackstone and its tributaries provide considerable water power; and there are various manufactures, including cotton goods, silk goods, and horse-shoes and other iron ware.
The chief interest of the place centres in its brine springs which are largely impregnated with carbonic acid gas and oxide of iron, and are efficacious in chronic catarrh of the respiratory organs, in liver and stomach disorders and women's diseases.
The town manufactures combs and horn goods, brass and iron wares, leather, malt, bricks and ropes.
Nothing could bend that cast iron will.
Ney, who had said that Napoleon ought to be brought to Paris in an iron cage, joined him with 6000 men on the 14th of March; and five days later the emperor entered the capital, whence Louis XVIII.
These periods fill the whole Bronze Age, with whose close, by the introduction of the superior metal, iron, the Aegean Age is conventionally held to end.
Iron came into general Aegean use about r000 B.C., and possibly was the means by which a body of northern invaders established their power on the ruins of the earlier dominion.
The terminus ad quem is less certain - iron does not begin to be used for weapons in the Aegean till after Period III.
Iron took the place of Bronze, and Aegean art, as a living thing, ceased on the Greek mainland and in the Aegean isles including Crete, together with Aegean writing.
This great disaster, which cleared the ground for a new growth of local art, was probably due to yet another incursion of northern tribes, more barbarous than their predecessors, but possessed of superior iron weapons - those tribes which later Greek tradition and Homer knew as the Dorians.
She is the mother of Ur, the personified fire of hell, who in anger and pride made a violent onset on the world of light, but was mastered by Hibil and thrown in chains down to the "black water," and imprisoned within seven iron and seven golden walls.
Some of the "porphyroids" which have grains of quartz and felspar in a finely schistose micaceous matrix are intermediate between porphyries and micaschists of this group. Still more numerous are orthoschists of hornblendic character (hornblende-schists) consisting of green hornblende with often felspar, quartz and sphene (also rutile, garnet, epidote or zoisite, biotite and iron oxides).
During the progress of the works, however, he acted as surveyor, and accumulated in that lucrative employment a sum of several thousand pounds, discovered after his death in an old iron chest, which had evidently lain unopened for above thirty years.
It is found also in beds of iron ore, and the haematite mines of the Cleator Moor district in west Cumberland have yielded many extremely fine crystals, specimens of which may be seen in all mineral collections.
The iron tubular bridge which carries the line over the Nepean is the best of its kind in the colony, while the viaduct over Knapsack Gulley is the most remarkable erection of its kind in Australia.
The North Bridge, a fine iron structure, spans the valley, giving connexion between the opposite higher parts of the town.
The worsted, woollen and cotton industries, and the iron, steel and machinery manufactures are very extensive.
Although the state has a great amount of limestone, especially in Erie and Ottawa counties, its dull colour renders it unsuitable for most building purposes.` It is, however, much used as a flux for melting iron and for making quick lime.
There is some iron ore in the eastern and south-eastern parts of the state, and the mining of it was begun early in the 19th century; but the output decreased from 254,294 long tons in 1889 to only 26,585 long tons (all carbonate) in 1908.
The value of the factory product was $748,670,855 in 1900 and $960,811,857 in 1905.1 The most important manufacturing industry is that of iron and steel.
A large portion of the iron and steel is manufactured in Cleveland, Youngstown, Steubenville, Bellaire, Lorain and Ironton.
Of far greater volume than the foreign commerce is the domestic trade in coal, iron, lumber, &c., largely by way of the Great Lakes.
The mineral wealth of Carinthia is great, and consists in lead, iron, zinc and coal.
Iron ore is extracted in the region of the Saualpe, and is worked in the foundries of St Leonhard, St Gertraud, Pravali, Hirt, Treibach and Eberstein.
The metallurgic industries are well developed, and consist in the production of iron, steel, machinery, small-arms, lead articles, wire-cables and rails.
The iron mines are among the oldest in the country; mining began probably as early as 1731.
Fibres and vegetable grasses, wool, hides and skins, cotton, sugar, iron and steel and their manufactures, chemicals, coal, and leather and its manufactures are the leading imports; provisions, leather and its manufactures, cotton and its manufactures, breadstuffs, iron and steel and.
Cairo is served by the Illinois Central, the Mobile & Ohio, the Cleveland, Cincinnati, Chicago & St Louis, the St Louis, Iron Mountain & Southern, and the St Louis South-Western railways, and by river steamboat lines.
It consists essentially of two rollers either both of wood, or one of wood and one of iron, geared to revolve in contact in opposite directions; the seed cotton is fed to the rollers, the lint is drawn through, and the seed being unable to pass between the rollers is rejected.
It is a strong acid, and dissolved in water decomposes carbonates and attacks iron and zinc.
The impurities occasionally present in commercial citric acid are salts of potassium and sodium, traces of iron, lead and copper derived from the vessels used for its evaporation and crystallization, and free sulphuric, tartaric and even oxalic acid.
Several of the citrates are much employed as medicines, the most important being the scale preparations of iron.
Of these iron and ammonium citrate is much used as a haematinic, and as it has hardly any tendency to cause gastric irritation or constipation it can be taken when the ordinary forms of iron are inadmissible.
Iron and quinine citrate is used as a bitter stomachic and tonic. In the blood citrates are oxidized into carbonates; they therefore act as remote alkalis, increasing the alkalinity of the blood and thereby the general rate of chemical change within the body.
The surrounding country abounds in coal, iron ore, oil, clay, stone and timber, for which the city is a distributing centre.
Assuming that, as the Chinese say, the Khitans were Manchus, the first appearance of the Manchus, as a people, in China dates from the beginning of the 10th century, when the Khitans, having first conquered the kingdom of Pohai, crossed the frontier into China 3 and established the Liao or Iron dynasty in the northern portion of the empire.
Other theories of a like nature were brought forward by various chemists, Mendeleeff, for example, ascribing the formation of petroleum to the action of water at high temperatures on iron carbide in the interior of the earth.
There is usually fixed above the sucker a short iron valverod, with a device known as a rivet-catcher to prevent damage to the pump by the dropping of rivets from the pump-rods.
To explode the charge an iron weight, known as a go-devil, was dropped into the well, and striking the disk exploded the cap and fired the torpedo.
The system usually adopted is a modification of the Canadian system already described, the boring rods being, however, of iron instead of wood, but the cable system has also to some extent been used.
Rivetted iron casing, made of s -in.
The barrels employed in the transport of petroleum products are made of well-seasoned white-oak staves bound by six or eight iron hoops.
They used an iron still, set in brickwork, and from a working charge of forty " buckets " of crude petroleum obtained a yield of sixteen buckets of " white naphtha."
A small piece of iron placed in this field tends to move from weak to strong places in the field with a force depending on the strength of the field and the rate at which the field varies.
In its simplest form an electromagnetic ammeter consists of a circular coil of wire in which is pivoted eccentrically an index needle carrying at its lower end a small mass of iron.
The needle is balanced so that gravity compels it to take a certain position in which the fragment of iron occupies a position in the centre of the field of the coil where it is weakest.
When a current is passed through the coil the iron tends to move nearer to the coil of the wire where the field is stronger and so displaces the index needle over the scale.
Another type of similar instrument consists of a coil of wire having a fragment of iron wire suspended from one arm of an index needle near the mouth of a coil.
When a current is passed through the wire forming the coil, the fragment of iron is drawn more into the aperture of the coil where the field is stronger and so displaces an index needle over a scale.
In the construction of this soft-iron instrument it is essential that the fragment of iron should be as small and as well annealed as possible and not touched with tools after annealing; also it should be preferably not too elongated in shape so that it may not acquire permanent magnetization but that its magnetic condition may follow the changes of the current in the coil.
The coil carries an index needle moving over a scale, and there is generally an iron core in the interior of the coil but fixed and independent of it.
The process of soap-boiling is carried out in large iron boilers called " soap pans " or " coppers," some of which have capacity for a charge of 30 tons or more.
Treatment of Settled Soap. - The upper layer having been removed, the desired soap is ladled out or ran off to a crutcher, which is an iron pan provided with hand or mechanical stirring appliances.
The frames into which hard soaps are ladled for cooling and solidification consist of rectangular boxes made of iron plates and bound and clamped together in a way that allows the sides to be removed when required; wooden frames are used in the case of mottled soaps.
They will hold their arms over their heads until the muscles atrophy, will keep their fists clenched till the nails grow through the palms, will lie on beds of nails, cut and stab themselves, drag, week after week, enormous chains loaded with masses of iron, or hang themselves before a fire near enough to scorch.
Imports are principally coal, iron and timber.
The finest agricultural land in the United States is near the lake, and there is an immense trade in all grains, fruits, livestock and lumber, and in products such as flour, pork, hides, leather goods, furniture, &c. Rich lead and copper mines abound, as also salt, iron and coal.
Escanaba, on Little Bay de Noc (Noquette), in the northern part of the lake, is a natural harbour and a large iron shipping port.
Thus in the Speculum Naturale of Vincent of Beauvais (c. 1250) it is said that there are four spirits - mercury, sulphur, arsenic and sal ammoniac - and six bodies - gold, silver, copper, tin, lead and iron.
Holland is a grain and fruit shipping centre, and among its manufactures are furniture, leather, grist mill products, iron, beer, pickles, shoes, beet sugar, gelatine, biscuit (Holland rusk), electric and steam launches, and pianos.
The mineral wealth of Moravia, consisting chiefly of coal and iron, is very considerable.
It owes its importance to the iron mines in the mountain Malmberget 4 z m.
Gowen (1836-1889), president of the Philadelphia and Reading Coal and Iron Company, sent James McParlan, an Irish Catholic and a Pinkerton detective (who some thirty years later attracted attention in the investigation of the assassination of Governor Steunenberg of Idaho), to the mining region in 1873; he joined the order, lived among the "Molly Maguires" for more than two years, and even became secretary of the Shenandoah division, one of the most notoriously criminal lodges of the order.
Iron ore, lignite, copper, mercury, molybdenite, nickel, platinum and other minerals have been found, but the quantity of each is too small, or the quality too poor, for them to be of commercial value.
During the golden age she remained among men distributing blessings, but when the iron (or bronze) age came on, she was forced to withdraw, being the last of the goddesses to quit the earth.
It is served by the Arkansas, Louisiana & Gulf, the Little Rock & Monroe, the% Vicksburg, Shreveport & Pacific (Queen & Crescent), and the St Louis, Iron Mountain & Southern railways, and by river steamers plying between New Orleans and Camden, Arkansas.
There are large slaughtering establishments, and factories for the refining of sugar and for the manufacture of tobacco goods, soap and perfumery, lead pencils, iron and steel, railway cars, chemicals, rubber goods, silk goods, dressed lumber, and malt liquors.
Industries include slate quarrying, shipbuilding, iron and brass foundries, alum, vitriol, manure, guano and tobacco works.
The principal industries are shipbuilding (iron), boiler and engineering works, iron and brass foundries, steam saw and planing mills, flour-mills, paper and paint factories, and soapworks.
From an analogy instituted between the healthy human being and gold, the most perfect of the metals, silver, mercury, copper, iron, lead and tin, were regarded in the light of lepers that required to be healed.
Gold, the most perfect metal, had the symbol of the Sun, 0; silver, the semiperfect metal, had the symbol of the Moon, 0j; copper, iron and antimony, the imperfect metals of the gold class, had the symbols of Venus Mars and the Earth tin and lead, the imperfect metals of the silver class, had the symbols of Jupiter 94, and Saturn h; while mercury, the imperfect metal of both the gold and silver class, had the symbol of the planet,.
For example, positive iron combined with negative oxygen to form positive ferrous oxide; positive sulphur combined with negative oxygen to form negative sulphuric acid; positive ferrous oxide combined with negative sulphuric acid to form neutral ferrous sulphate.
The Egyptians obtained silver, iron, copper, lead, zinc and tin, either pure or as alloys, by smelting the ores; mercury is mentioned by Theophrastus (c. 300 B.C.).
At the same time Berzelius obtained the element, in an impure condition, by fusing silica with charcoal and iron in a blast furnace; its preparation in a pure condition he first accomplished in 1823, when he invented the method of heating double potassium fluorides with metallic potassium.
Of the principal workers in this field we may notice Friedrich Hoffmann, Andreas Sigismund Marggraf (who detected iron by its reaction with potassium ferrocyanide, and potassium and sodium by their flame colorations), and especially Carl Scheele and Torbern Olof Bergman.
If silica be present, it gives the iron bead when heated with a little ferric oxide; if tin is present there is no change.
The phosphates of aluminium, chromium and iron are precipitated, and the solution contains the same metals as if phosphoric acid had been absent.
To the filtrate from the aluminium, iron and chromium precipitate, ammonia and ammonium sulphide are added; the precipitate may contain nickel, cobalt, zinc and manganese sulphides.
In the first group, we have to notice the titration of a cyanide with silver nitrate, when a milkiness shows how far the reaction has gone; the titration of iron with permanganate, when the faint pink colour shows that all the iron is oxidized.
A blue coloration indicates nitrogen, and is due to the formation of potassium (or sodium) cyanide during the fusion, and subsequent interaction with the iron salts.
Attached to the bulb was a glass rod and then a tube containing iron wire.
The mining industry on which the town formerly depended is extinct, but the district is agricultural and dairy farming is carried on, while the town has flour mills, tanneries and iron foundries.
Round the walls of the rotunda are the cells, 208 in number, and arranged in four tiers with balconies reached by iron staircases.
A point of importance as to the prehistoric period was scored by the discovery in the same neighbourhood at Gerzeh by Mr. Wainwright of iron beads on a necklace.
The oldest iron weapon known was hitherto supposed to be an Egyptian halbert-head of the time of Rameses III., but Mr. Randall Maclver has recently discovered in a tomb of the XII.
Minerals, in which Oberhessen is much richer than the two other provinces, include iron, manganese, salt and some coal.
Its once famous tanneries have lost their importance, but the manufacture of linen has increased; it has also steam flour-mills, distilleries, manufactories of soap and of iron implements.
Here is situated the Dreher brewery, the largest in the monarchy; and there are also important smelting and iron works, cotton-spinning, factories of electrical plant, &c. The meeting at Schwechat of the emperor Leopold I.
A matrix of wood or iron is covered with successive layers of papers, pasted together so as to form pasteboard.
In 1656, 1657 and 1658 laws were passed to prevent the introduction of Quakers into Massachusetts, and it was enacted that on the first conviction one ear should be cut off, on the second the remaining ear, and that on the third conviction the tongue should be bored with a hot iron.
There are also iron foundries and machine factories.
At any rate it was a notable trading-place and emporium as early as the Stone Age, and continued to enjoy its importance as such through the Bronze and Iron Ages, as is proved, inter alia, by the large number of Arabic, Anglo-Saxon and other coins which have been found on the island..
Saw-mills, iron foundries, chemicals, glass and soap works, shipbuilding yards and a cocoanut-oil factory in connexion with the soap-manufacture at Port Sunlight, England,are among the chief industrial establishments.
Coal, oil, natural gas, clay and iron are found in the vicinity, and among the city's manufactures are iron, steel, glass, furniture and pottery.
The mineral wealth of the Cyclades has hitherto been much neglected; iron ore is exported from Seriphos, manganese and sulphur from Melos, and volcanic cement (pozzolana) from Santorin.
An iron ring on one of the chimneys is said to be that on which he hung the victims of his.
A flight of iron steps enables the visitor now to examine this venerable specimen of early Christian art.
The chief industrial establishments are iron foundries, railway and motor engineering works, breweries, flour-mills, tanneries and manufactories of confectionery, artificial manure, &c. There is water communication by the Ouse with the Humber, and by the Foss Navigation to the N.E.
Hedenbergite, or calcium iron pyroxene, is a black mineral closely allied to diopside and, owing to the isomorphous replacement of iron by magnesium, there is no sharp line of division between them.
Babingtonite is found as small black crystals on felspar in the granite of Baveno in Italy, and in the Haytor iron mine in Devonshire.
The Yenangyat oil-fields, which produce quantities of petroleum, are in the south of the district, and iron used to be worked in a small way.
Meissen also contains iron foundries, factories for making earthenware stoves and pottery, sugar refineries, breweries and tanneries.
In the Tertiary region are found small quantities of iron ore and an indifferent brown coal.
Large copper deposits of peculiar richness occur here in the Sierra de Cobre, near the city of Santiago; and both iron and manganese are abundant.
Besides the deposits in Oriente province, iron is known to exist in considerable amount in Camaguey and Santa Clara, and copper in Camaguey and Pinar del Rio provinces.
The iron ores mined at Daiquiri near Santiago are mainly rich hematites running above 60% of iron, with very little sulphur or phosphorus admixture.
Deep residual clay soils derived from underlying limestones, and coloured red or black according to the predominance of oxides of iron or vegetable detritus, characterize the plains.
Iron and manganese have, on the contrary, been greatly developed in the same period.
Iron is now the most important mineral product.
The iron ores are even more accessible than the famous ones of the Lake Superior region in the United States.
The other industries are leather work, sugar-refining, goldsmith's work, ivory carving, iron, brass, copper, stone masonry, tanning, weaving, dyeing and carpentry.
In 1862 Fleck passed a mixture of steam, nitrogen and carbon monoxide over red-hot lime, whilst in 1904 Woltereck induced combination by passing steam and air over red-hot iron oxide (peat is used in practice).
Andros Island and the Abaco Islands may be specially noted for their profusion of large timber, including mahogany, mastic, lignum vitae, iron and bullet woods, and many others.
Bosnia is rich in minerals, including coal, iron, copper, chrome, manganese, cinnabar, zinc and mercury, besides marble and much excellent building stone.
After 1881 the Mining Company of Bosnia began to develop the coal and iron fields; and from 1886 its operations were continued by the government.
Among the larger private establishments there existed in the same year seven breweries, one brandy distillery, two jam, two soap and candle factories, two building and furniture works, a factory for spinning thread, one iron and steel works, one paper and one ammonia and soda factory, and one mineral-oil refinery.
According to these statistics the most important articles of export are coal and turf, fruit, minerals, soda, iron and steel, and cattle.
Not far off, similar relics were found at Sobunar, Zlatiste and Debelobrdo; iron and bronze ornaments, vessels and weapons, often of elaborate design, occur in the huts and cemeteries of Glasinac, and in the cemetery of Jezerine, where they are associated with objects in silver, tin, amber, glass, &c. Among the numerous finds made in other districts may be mentioned the discovery, at Vrankamer, near Bihac, of 98 African coins, the oldest of which dates from 300 B.C. Many vestiges of Roman rule survive, such as roads, mines, ruins, tombs, coins, frescoes and inscriptions.
The empire is rich in minerals, including gold, silver, lead, copper, iron, coal, mercury, borax, emery, zinc; and only capital is needed for successful exploitation.
There are extensive coal-fields and important iron, metal and machine industries, together with the manufacture of chemicals and corn-milling.
Its railway car repair and construction shops, belonging to the Norfolk & Western railway, employed in that year 66.9% of the total number of factory wage-earners; pig-iron, structural iron, canned goods, bottles, tobacco, planing-mill products and cotton are among the manufactures.
The last distinctive epithet was derived from the little hamlet in the vicinity which furnished shelter, not only to the workmen, but to the monks of St Jerome who were afterwards to be in possession of the monastery; and the hamlet itself is generally but perhaps erroneously supposed to be indebted for its name to the scoriae or dross of certain old iron mines.
Cleveland is the largest ore market in the world, and its huge ore docks are among its most interesting features; the annual receipts and shipments of coal and iron ore are enormous.
The most important manufactures are iron and steel, carriage hardware, electrical supplies, bridges, boilers, engines, car wheels, sewing machines, printing presses, agricultural implements, and various other commodities made wholly or chiefly from iron and steel.
More steel wire, wire nails, and bolts and nuts are made here than in any other city in the world (the total value for iron and steel products as classified by the census was, in 1905, $42,930,995, and the value of foundry and machine-shop products in the same year was $18,832,487), and more merchant vessels than in any other American city.
The discovery of iron ore in the Lake Superior region made Cleveland the natural meeting-point of the iron ore and the coal from the Ohio, Pennsylvania and West Virginia mines; and it is from this that the city's great commercial importance dates.
The growth during the Civil War was partly due to the rapid development of the manufacturing interests of the city, which supplied large quantities of iron products and of clothing to the Federal government.
This iron has very often beautiful Widmannstatten figures like those of iron meteorites, but it is obviously of telluric origin.'
In 1895 Peary found native iron at Cape York; since John Ross's voyage in 1818 it has been known to exist there, and from it the Eskimo got iron for their weapons.
The electro-deposition of brass-mainly on iron ware, such as bedstead tubes-is now very widely practised, the bath employed being a mixture of copper, zinc and potassium cyanides, the proportions of which vary according to the character of the brass required, and to the mode of treatment.
For example, Wilde produced copper printing surfaces for calico printing-rollers and the like by immersing rotating iron cylinders as cathodes in a copper bath.
Iron was unknown to them; but they excelled in bronze, silver and gold work.
They were acquainted with iron, and learned from their subjects the art of bronze-casting, which they used for decorative purposes only, and to which they gave a still higher artistic stamp. Their pottery is much more perfect and more artistic than that of the Bronze period, and their ornaments are accounted among the finest of the collections at the St Petersburg museum of the Hermitage.
On the defeat of the adventurer Stenka Razin (1667-1671) many who were unwilling to submit to the iron rule of Moscow made their way to the settlements of Stroganov in Perm, and tradition has it that, in order to get rid of his guests, Stroganov suggested to their chief, Yermak, that he should cross the Urals into Siberia, promising to help him with supplies of food and arms. Yermak entered Siberia in 1580 with a band of 1636 men, following the Tagil and Tura rivers.
Cleavage sheets are frequently disfigured and rendered of little value by brown, red or black spots and stains, often with a dendritic arrangement of iron oxides.
They are silicates, usually orthosilicates, of aluminium together with alkalis (potassium, sodium, lithium, rarely rubidium and caesium), basic hydrogen, and, in some species magnesium, ferrous and ferric iron, rarely chromium, manganese and barium.
Clarke (1889-1893) supposes them to be substitution derivatives of normal aluminium orthosilicate A14(S104)3, in which part of the aluminium is replaced by alkalis, magnesium, iron and the univalent groups (MgF), (A1F2),(AlO), (MgOH); an excess of silica is explained by the isomorphous replacement of H 4 SiO 4 by the acid H4S130s.
The import trade consists of timber, maize, paper, crockery, sugar, tobacco, kerosene oil, &c. Gold has been found in the territory, and silver, tin, lead and iron are said to exist.
In 1836 a railway from Bangor to Old Town was completed; this was the first railway in the state; Bangor had, also, the first electric street-railway in Maine (1889), and one of the first iron steamships built in America ran to this port and was named "Bangor."
Of its mineral springs, the best known are the sulphur springs of Baden, the iodine springs of Deutsch-Altenburg, the iron springs of Pyrawarth, and the thermal springs of Voslau.
It possesses worsted and cotton mills, iron works, dye works and chemical works.
Galena occurs in veins in the Cambrian clay-slate, accompanied by copper and iron pyrites, zinc-blende, quartz, calcspar, iron-spar, &c.; also in beds or nests within sandstones and rudimentary limestones, and in a great many other geological formations.
The native carbonate or cerussite (q.v.) occasionally occurs in the pure form, but more frequently in a state of intimate intermixture with clay ("lead earth," Bleierde), limestone, iron oxides, &c. (as in the ores of Nevada and Colorado), and some times also with coal ("black lead ore").
In Cumberland, Northumberland, Durham and latterly the United States, the reverberatory furnace is used only for roasting the ore, and the oxidized ore is then reduced by fusion in a low, square blastfurnace (a "Scottish hearth furnace") lined with cast iron, as is also the inclined sole-plate which is made to project beyond the furnace, the outside portion (the "work-stone") being provided with grooves guiding any molten metal that may be placed on the "stone" into a cast iron pot; the "tuyere" for the introduction of the wind was, in the earlier types, about half way down the furnace.
In the more recent form of the hearth process the blocks of cast iron forming the sides and back of the Scottish furnace are now generally replaced in the United States by water-cooled shells (waterjackets) of cast iron.
The shaft, resting upon arches supported by four cast iron columns about 9 ft.
It is enclosed by water-jackets, which are usually cast iron, sometimes mild steel.
The kettle is spherical, and is suspended over a fire-place by a broad rim resting on a wall; it is usually of cast iron.
In the Pattinson process the argentiferous lead is melted down in the central cast iron kettle of a series 8-15, placed one next to the other, each having a capacity of 9-15 tons and a separate fire-place.
Its common adulterants are iron oxides, powdered barytes and brick dust.
Powdered galena is dissolved in hot hydrochloric acid, the solution allowed to cool and the deposit of impure lead chloride washed with cold water to remove iron and copper.
Among the manufactures are rubber goods, chemicals, iron castings, woollen goods, cutlery, &c. The value of the factory products increased from $8,886,676 in 1900 to $11,009,573 in 1905, or 23.9%.
The agricultural trade is extensive, and there are iron, brass and agricultural machine works.
General Phenomena Pieces of a certain highly esteemed iron ore, which consists mainly of the oxide Fe 3 0 4, are sometimes found to possess the power of attracting small fragments of iron or steel.
If a magnet is dipped into a mass of iron filings and withdrawn, filings cling to certain parts of the stone in moss-like tufts, other parts remaining bare.
Steel is much more retentive of magnetism than any ordinary iron, and some form of steel is now always used for making artificial magnets.
A bar of soft iron introduced into the coil is at once magnetized, the magnetism, however, disappearing almost completely as soon as the current ceases to flow.
With suitable arrangements of iron and coil and a sufficiently strong current, the intensity of the temporary magnetization may be very high, and electromagnets capable of lifting weights of several tons are in daily use in engineering works.
If the bar inserted into the coil is of hardened steel instead of iron, the magnetism will be less intense, but a larger proportion of it will be retained after the current has been cut off.
Some of the principal phenomena of magnetism may be demonstrated with very little apparatus; much may be done with a small bar-magnet, a pocket compass and a few ounces of iron filings.
If one pole of the bar-magnet is brought near the compass, it will attract the opposite pole of the compass-needle; and the magnetic action will not be sensibly affected by the interposition between the bar and the compass of any substance whatever except iron or other magnetizable metal.
It is to the non-uniformity of the field surrounding a magnet that the apparent attraction between a magnet and a magnetizable body such as iron is ultimately due.
Heusler that an alloy consisting of copper, aluminium and manganese (Heusler's alloy), possesses magnetic qualities comparable with those of iron.
Practically the metals iron, nickel and cobalt, and some of their alloys and compounds constitute a class by themselves and are called ferromagnetic substances.
Those substances which are attracted, or rather which tend, like iron, to move from weaker to stronger parts of the magnetic field, are termed paramagnetic; those which are repelled, or tend to move from stronger to weaker parts of the field, are termed diamagnetic. Between the ferromagnetics and the paramagnetics there is an enormous gap. The maximum magnetic susceptibility of iron is half a million times greater than that of liquid oxygen, one of the strongest paramagnetic substances known.
The dimensions of a piece of iron, for example, its elasticity, its thermo-electric power and its electric conductivity are all changed under the influence of magnetism.
In certain cases, as, for instance, in an iron ring wrapped uniformly round with a coil of wire through which a current is passing, the induction is entirely within the metal; there are, consequently, no free poles, and the ring, though magnetized, constitutes a poleless magnet.
The circulation of magnetic induction or flux through magnetic and non-magnetic substances, such as iron and air, is in many respects analogous to that of an electric current through good and bad conductors.
Since i +47-K' can never be negative, the apparent susceptibility will be positive or negative according as is greater or less than Thus, for example, a tube containing a weak solution of an iron salt will appear to be diamagnetic if it is immersed in a stronger solution of iron, though in air it is paramagnetic.4 Circular Magnetization.
Hence any apparatus, such as a galvanometer, may be partially shielded from extraneous magnetic action by enclosing it in an iron case.
The ballistic method is largely employed for determining the relation of induction to magnetizing force in samples of the iron and steel used in the manufacture of electrical machinery, and especially for the observation of hysteresis effects.
The closed figure a c d e a is variously called a hysteresis curve or diagram or loop. The area f HdB enclosed by it represents the work done in carrying a cubic centimetre of the iron through the corresponding magnetic cycle; expressed in ergs this work is I HdB.
Fleming, it 47r requires about 18 foot-pounds of work to make a complete mag netic cycle in a cubic foot of wrought iron, strongly magnetized first one way and then the other, the work so expended taking the form of heat in the mass.
Ewing's hysteresis-tester, 2 which is specially intended for testing the sheet iron used in transformers.
The value of the constant / 7 ranges in different metals from about o ooI to 0.04; in soft iron and steel it is said to be generally not far from 0.002.
Fleming rightly regards it as not a little curious that for materials differing so much as this cast cobalt and soft annealed iron the hysteretic exponent should in both cases be so near to 1.6.
This value of B corresponds to I =1640, the saturation point for soft iron.
Shimizu 3 indicate that Steinmetz's formula holds for nickel and annealed cobalt up to B =3000, for cast cobalt and tungsten steel up to B =8000, and for Swedish iron up to B =18,000, the range being in all cases extended at the temperature of liquid air.
Thin sheet iron o 367 mm.
During the first stage, when the magnetizing force is small, the magnetization (or the induction) increases rather slowly with increasing force; this is well shown by the nickel curve in the diagram, but the effect would be no less conspicuous in the iron curve if the abscissae were plotted to a larger scale.
Under increasing magnetizing forces, greatly exceeding those comprised within the limits of the diagram, the magAetization does practically reach a limit, the maximum value being attained with a magnetizing force of less than 2000 for wrought iron and nickel, and less than 4000 for cast iron and cobalt.
The magnetic quality of a sample of iron depends very largely upon the purity and physical condition of the metal.
A very pure form of iron, which from the method of its manufacture is called " steel," is now extensively used for the construction of dynamo magnets; this metal sometimes contains not more than 0.3% of foreign substances, including carbon, and is magnetically superior to the best commercial wrought iron.
To secure the highest possible permeability it is essential that the iron should be softened by careful annealing.
An experiment by Ewing showed that by the operation of stretching an annealed iron wire beyond the limits of elasticity the permeability under a magnetizing force of about 3 units was reduced by as much as 75%.
The permeability of a soft iron wire, which was tapped while subjected to a very small magnetizing force, rose to the enormous value of about 80,000 (Magnetic Induction, § 85).
It follows that in testing iron for magnetic quality the greatest care must be exercised to guard the specimen against any accidental vibration.
Low hysteresis is the chief requisite for iron which is to be used for transformer cores, and it does not necessarily accompany high permeability.
Parshall quotes tests of six samples of iron, described as of good quality, which showed an average hysteresis loss of 3070 ergs per c.cm.
Taking the density of iron to be 7.7, the factor for reducing the loss in ergs per c.cm.
A A, called the " yoke," is a block of annealed wrought iron about 18 in.
He applied his method with good effect, however, in testing a large number of commercial specimens of iron and steel, the magnetic constants of which are given in a table accompanying his paper.
Ewing (Magnetic Induction, § 194) has devised an arrangement in which two similar test bars are placed side by side; each bar is surrounded by a magnetizing coil, the two coils being connected to give opposite directions of magnetization, and each pair of ends is connected by a short massive block of soft iron having holes bored through it to fit the bars, which are clamped in position by set-screws.
The results, nevertheless, agree very well with those for annealed wrought iron obtained by other methods.
Several instruments in which the traction method is applied have been devised for the rapid measurement of induction or of magnetization in commercial samples of iron and steel.
Ewing has described an arrangement in which the test bar has a soft-iron pole piece clamped to each of its ends; the pole pieces are joined by a long well-fitting block of iron, which is placed upon them (like the " keeper " of a magnet), and the induction is measured by the force required to detach the block.
In the magnetic balance of du Bois (Magnetic Circuit, p. 346) the uncertainty arising from the presence of a joint is avoided, the force measured being that exerted between two pieces of iron separated from each other by a narrow air-gap of known width.
Y Y' is a so.- iron yoke, which rocks upon knife-edges K and constitutes the beam of the balance.
Several pieces of apparatus have been invented for comparing the magnetic quality of a sample with that of a standard iron rod by a zero method, such as is employed in the comparison of electrical resistances by the Wheatstone bridge.
The standard rod and the test specimen, which must be of the same dimensions, are placed side by side within two magnetizing coils, and each pair of adjacent ends is joined by a short rectangular block or " yoke " of soft iron.
An iron bar shaped like an inverted L projects upwards from each of the yokes, the horizontal portions of the bars being parallel to the rods, and nearly meeting at a height of about 8 in.
Suppose the switches to be adjusted so that the effective number of turns in the variable coil is loo; the magnetizing forces in the two coils will then be equal, and if the test rod is of the same quality as the standard, the flow of induction will be confined entirely to the iron circuit, the two yokes will be at the same magnetic potential, and the compass needle will not be affected.
Upon the central neck was wound a coil consisting of one or two layers of very fine wire, which was connected with a ballistic galvanometer for measuring the induction in the iron; outside this coil, and separated from it by a small and accurately determined distance, a second coil was wound, serving to measure the induction in the iron, together with that in a small space surrounding it.
The difference of the ballastic throws taken with the two coils measured the intensity of the field in the space around the iron, and it also enabled a correction to be made for the nonferrous space between the iron neck and the centre of the thickness of'the inner coil.
The value of the residual induction which persisted when the bobbin was drawn out was added to that of the induction measured, and thus the total induction in the iron was determined.
Thus the magnetization which the sample of Swedish iron received in a field of 1490 was not increased (beyond the limits of experimental error) when the intensity of the field was multiplied more than thirteen-fold, though the induction was nearly doubled.
Using an unannealed Swedish iron wire, he found that when H was gradually diminished from 0.04 to 0.00004 C.G.S.
Experiments with annealed iron gave less satisfactory results, on account of the slowness with which the metal settled down into a new magnetic state, thus causing a " drift " of the magnetometer needle, which sometimes persisted for several seconds.
Ann., 18 95, 54,655), who found the limiting values of to be 7.5 to 9.5 for iron, and 11.2 to 13.5 for steel, remaining constant up to H = 06; by P. Culmann (Elekt.
While therefore the initial susceptibility of nickel is less than that of iron and steel, the range of magnetic force within which it is approximately constant is about one hundred times greater.
On the application of a small magnetizing force to a bar of soft annealed iron, a certain intensity of magnetization is instantly produced; this, however, does not remain constant, but slowly increases for some seconds or even minutes, and may ultimately attain a value nearly twice as great as that observed immediately after the force was applied.'
By the alternate application and withdrawal of a small magnetizing force a cyclic condition may be established in an iron rod.
In hardened iron and steel the effect can scarcely be detected, and in weak fields these metals exhibit no magnetic hysteresis of any kind.
P. Joule, who in 1842 and 1847 described some experiments which he had made upon bars of iron and steel.
According to Joule's observations, the length of a bar of iron or soft steel was increased by magnetization, the elongation being proportional up to a certain point to the square of the intensity of magnetization; but when the " saturation point " was approached the elongation was less than this law would require, and a stage was finally reached at which further increase of the magnetizing force produced little or no effect upon the length.
In order to meet the objection that the phenomenon might be due to electromagnetic action between the coil and the rod, Bidwell made some experiments with iron rings, and found that the length of their diameters varied under magnetization in precisely the same manner as the length of a straight rod.
Experiments were afterwards made with rods of iron, nickel, and cobalt, the external field being carried up to the high value of 1500 units.
It appears that the contraction which followed the initial extension of the iron reached a limit in fields of i 000 or 1100.
Nickel exhibited retraction from the very beginning (as observed by Barrett), its greatest change of length considerably exceeding that undergone by iron; in a field of Boo the original length was diminished by as much as 1/40,000 part, but stronger forces failed to produce any further effect.
Roughly speaking, therefore, cobalt behaves oppositely to iron.
The truth appears to be that a hardened steel rod generally behaves like one of iron or soft steel in first undergoing extension under increasing magnetizing force, and recovering its original length when the force has reached a certain critical value, beyond which there is contraction.
What actually happens when an iron wire is loaded with various weights is clearly shown in Fig.
Knott on magnetic twist, which will be referred to later, led him to form the conclusion that in an iron wire carrying an electric current the magnetic elongation would be increased.
Yet notwithstanding this enormous effect in iron, the action of a current upon nickel and cobalt turned out to be almost inappreciable.
Some experiments were next undertaken with the view of ascertaining how far magnetic changes of length in iron were dependent upon the hardness of the metal, and the unexpected result was arrived at that softening produces the same effect as tensile stress; it depresses the elongation curve, diminishing the maximum extension, and reducing the " critical value " of the magnetizing force.
A thoroughly well annealed ring of soft iron indeed showed no extension at all, beginning to contract, like nickel, under the smallest magnetizing forces.
Hence the changes of volume undergone by a given sample of wrought iron under increasing magnetization must depend largely upon the state of the metal as regards hardness; there may be always contraction, or always expansion, or first one and then the other.
Bidwell's results for iron and nickel were confirmed, and it was further shown that the elongation of nickel-steel was very greatly diminished by tension; when 2 Joule believed that the volume was unchanged.
Honda subjected tubes of iron, steel and nickel to the simultaneous action of circular and longitudinal fields, and observed the changes of length when one of the fields was varied while the other remained constant at different successive values from zero upwards.
Nagaoka and Honda, who employed a fluid dilatometer, found that the volume of several specimens of iron, steel and nickel was always slightly increased, no diminution being indicated in low fields; cobalt, on the other hand, was diminished in volume, and the amount of the change, though still very small, was greater than that shown by the other metals.
Various nickel-steels all expanded under magnetization, the increase being generally considerable and proportional to the field; in the case of an alloy containing 29% of nickel the change was nearly 40 times greater than in soft iron.
Knott, who made an exhaustive series of experiments upon various metals in the form of tubes, concluded that in iron there was always a slight increase of volume, and in nickel and cobalt a slight decrease.
It has been suggested 2 that an iron rod under magnetization may be in the same condition as if under a mechanically applied longitudinal stress tending to shorten the iron.
Villari in 1868 that the magnetic susceptibility of an iron wire was increased by stretching when the magnetization was below a certain value, but diminished when that value was exceeded; this phenomenon has been termed by Lord Kelvin, who discovered it independently, the " Villari reversal," the value of the magnetization for which stretching by a given load produces no effect being known as the " Villari critical point " for that load.
The Villari critical point for aegiven sample of iron is reached with a smaller magnetizing force when the stretching load is great than when it is small; the reversal also occurs with smaller loads and with weaker fields when the iron is soft than when it is hard.
The effects of longitudinal pressure are opposite to those of traction; when the cyclic condition has been reached, pressure reduces the magnetization of iron in weak fields and increases it in strong fields (Ewing, Magnetic Induction, 1900, 223).
Thomson, who, from the results of Bidwell's observations on the magnetic deformation of cobalt, was led to expect that that metal would exhibit a reversal opposite in character to the effect observed in iron.
So, too, the Villari reversals in iron and cobalt might have been predicted - as indeed that in cobalt actually was - from a knowledge of the changes of length which those metals exhibit when magnetized.
In the iron cylinder and ovoid, which expanded when magnetized, compression caused a diminution of magnetization; in the nickel rod, which contracted when magnetized, pressure was attended by an increase of magnetization.
The amount of the change was in both cases exceedingly small, that in iron being less than 0.1 C.G.S.
An iron tube, having its ends closed by brass caps, was placed inside a compressing vessel into which water was forced until the pressure upon the outer surface of the tube reached 250 atmospheres.
Under increasing magnetizing force the magnetization first increased, reached a maximum, and then diminished until its value ultimately became less than when the iron was in the unstrained condition.
The twist effect exhibited by iron under moderate longitudinal magnetization has been called by Knott a positive Wiedemann effect; if the twist were reversed, the other conditions remaining the same, the sign of the Wiedemann effect would be negative.
Iron (moderately magnetized) expands along the lines of magnetization, and therefore for a right-handed spiral exhibits a right-handed twist.
Now nickel contracts instead of lengthening when it is magnetized, and an experiment by Knott showed, as he expected, that caeteris paribus a nickel wire twists in a sense opposite to that in which iron twists.
The Wiedemann effect being positive for iron is negative for nickel.
Further, although iron lengthens in fields of moderate strength, it contracts in strong ones; and if the wire is stretched, contraction occurs with smaller magnetizing forces than if it is unstretched.
Bidwell 2 accordingly found upon trial that the Wiedemann twist of an iron wire vanished when the magnetizing force reached a certain high value, and was reversed when that value was exceeded; he also found that the vanishing point was reached with lower values of the magnetizing force when the wire was stretched by a weight.
If a longitudinally magnetized wire is twisted, circular magnetization is developed; this is evidenced by the transient electromotive force induced in the iron, generating a current which will deflect a galvanometer connected with the two ends of the wire.
Let each of the effects A, B, C, D and E be called positive when it is such as is exhibited by moderately magnetized iron, and negative when its sense is opposite.
Ordinary magnetizable iron is in many respects an essentially different substance from the non-magnetizable metal into which it is transformed when its temperature is raised above a certain point.
The first exact experiments demonstrating the changes which occur in the permeability of iron,, 3 Phil.
Steel behaves in a similar manner, but the maximum permeability is not so high as in iron, and the fall, when the critical point is approached, is less abrupt.
The whole was wrapped in several coverings of asbestos and placed in a glass vessel from which the air was partially exhausted, additional precautions being taken to guard against oxidation of the iron.
Morris's results for iron, and gives some additional observations for steel, nickel and cobalt.
As thus defined the critical temperatures for iron, nickel and cobalt were 1 Journ.
After this operation had been repeated a few times the iron was found to have acquired a stable condition, and the curves corresponding to the two temperatures became perfectly definite.
They showed that the permeability of this sample of iron was considerably diminished at the lower temperature.
Most of the permeability-temperature curves were more or less convex towards the axis of temperature, and in all the experiments except those with annealed iron and steel wire, the permeability was greatest at the lowest temperature.
Experiments with the sample of unannealed iron failed to give satisfactory results, owing to the fact that no constant magnetic condition could be obtained.
The hysteresis-loss in Swedish iron was decreased for inductions below about 9000 and increased for higher inductions; in tungsten-steel, nickel and cobalt the hysteresis-loss was always increased by cooling.
An alloy containing about 3 parts of iron and I of nickel - both strongly magnetic metals - is under ordinary conditions practically non-magnetizable (1 1=1'4 for any value of H).
The most striking phenomenon which they bring into prominence is the effect of any considerable quantity of manganese in annihilating the magnetic property of iron.
According to Hopkinson's calculation, this sample behaved as if 91% of the iron contained in it had completely lost its magnetic property.'