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tar

tar

tar Sentence Examples

  • Rictiovarus in disgust cast himself into the fire, or the caldron of boiling tar, from which they had emerged refreshed.

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  • Rictiovarus in disgust cast himself into the fire, or the caldron of boiling tar, from which they had emerged refreshed.

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  • The frozen sea beneath her feet was the color of tar, the black clouds above paused mid-swirl around a pop of blue sky in the storm's center.

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  • Pine stumps and waste limbs are utilized, notably at Hattiesburg, for the manufacture of charcoal, tar, creosote, turpentine, &c. Fisheries Fishing is a minor industry, confined for the most part to the Mississippi Sound and neighbouring waters and to the Mississippi and Yazoo rivers.

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  • PYRENE, C16H10, a hydrocarbon found together with chrysene in the last portion of the coal tar distillate, and also in "Stupp" fat.

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  • In that most largely used, known as " creosoting," dead oil of tar, to the amount of some 3 gallons per sleeper, is forced into the wood under pressure, or is sucked in by vacuum, both the timber and the oil being heated.

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  • Owing to the pine forests pitch and tar were important manufactures in early times.

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  • Lampblack is prepared by burning tar, resin, turpentine and other substances rich in carbon, with a limited supply of air; the products of combustion being conducted into condensing chambers in which cloths are suspended, on which the carbon collects.

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  • Lampblack is prepared by burning tar, resin, turpentine and other substances rich in carbon, with a limited supply of air; the products of combustion being conducted into condensing chambers in which cloths are suspended, on which the carbon collects.

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  • On the 16th of July 1893 the first little army of " New Australians " left Sydney in the " Royal Tar," which arrived at Montevideo on the 31st of August.

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  • Jews, and elsewhere Russians,-to whom the peasants are for the most part in debt, as they purchase in advance on security of subsequent payments in corn, tar, wooden wares, &c. A good deal of the internal trade is carried on by travelling merchants.

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  • The crude solid product from the tar distillate is digested with carbon bisulphide to dissolve the pyrene, the solution filtered and the solvent evaporated.

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  • Pyrogallol dimethyl ether is found in beechwood tar.

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  • mixture of gutta-percha, rosin and Stockholm tar).

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  • Tar.

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  • This page gives an overview of all articles in the 1911 Brittanica which are alphabetized under T to Tar.

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  • The higher olefines are found in the tar which is obtained by distilling bituminous shales, in illuminating gas, and among the products formed by distilling paraffin under pressure (T.

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  • He took out patents for lamps to burn oil of tar, for the propulsion of ships at sea, for facilitating excavation, mining and sinking, for rotary steam-engines and for other purposes; and so early as 1843 he was an advocate of the employment of steam and the screw propeller in warships.

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  • Bueb (Congress of German Gas Industries, March 1900) brings gas (free from tar) into intimate contact with a saturated solution of ferrous sulphate, when a "cyanogen mud" is obtained.

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  • South Carolina and Georgia furnish the broadest and most typical section of this important physiographic province: here the more sandy and hilly interior parts are largely occupied by pine forests, which furnish much hard or yellow pine lumber, tar and turpentine.

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  • Coal and lignitic coal are the principal economic minerals met with in this central plain, though natural gas occurs and is put to use near Medicine Hat, and " tar sands " along the northeastern edge of the Cretaceous indicate the presence of petroleum.

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  • PAIGNTON, a seaside resort in the Torquay parliamentary division of Devonshire, England, on Tar Bay, 24 m.

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  • P. i., iiriv ir tar] 11] OfCJpeZ 6v fi ov Kai Ta W inrapxovra Ka6' avr6).

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  • from Nasibin in the north-east, bringing with it the waters of the many streams from the Tar `Abdin highlands; the north 'Awij, which at certain seasons brings much water due south from Mardin, and the main stream of the Khabur, which has come 60 m.

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  • In the pre-Persian period, besides those referred to elsewhere, we may cite Kashyari (Tar `Abdin), Guzanu (Gozan of 2 Kings xvii.

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  • The language is in most parts Arabic; but Turkish is spoken in Birejik and Urfa, Kurdish and Armenian south of Diarbekr, and some Syriac in Tar `Abdin.

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  • Materials like tar and pitch are sometimes employed as a matrix; they are used hot and without water, the solidifying action being due to cooling and to evaporation of the mineral oils contained in them.

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  • This purified oxide, mixed with sodium chloride and coal tar, was carbonized at a red heat, and ignited in a current of dry chlorine as long as vapours of the double chloride were given off, these being condensed in suitable chambers.

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  • But immediately above this level the charge is relatively viscous, because here the temperature has fallen so far that it is now at the melting or formation point of the slag, which therefore is pasty, liable to weld the whole mass together es so much tar would, and thus to obstruct the descent of the charge, or in short to " scaffold."

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  • The lining of the converter is made of 90% of the mixture of lime and magnesia which results from calcining dolomite, (Ca,Mg)CO i, at a very high temperature, and 10% of coal tar freed from its water by heating.

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  • Tar, pitch, resin, ..

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  • tar peers, so as to prevent the resistance of the Upper el0ction Y P ?

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  • FLUORANTHENE, C15H10, also known as idryl, a hydrocarbon occurring with phenanthrene, pyrene, diphenyl, and other substances in "Stupp" fat (the fat obtained in working up the mercury ores in Idria), and also in the higher boiling fractions of the coal tar distillate.

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  • From the tar distillate, the chrysene can be fractionally precipitated, and the fluoranthene can be separated from most of the pyrene by fractional distillation in a partial vacuum.

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  • Bethell and patented by him in 1838, the timber is impregnated with oil of tar.

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  • Tar, pitch and turpentine are obtained from the wood of th's tree, which weighs from 30 to 38 lb per cub.

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  • Corn, tar, and especially timber are exported.

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  • Hot tar - Angus Smith's process - is used for water-pipes.

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  • His treatises Coal Tar and Ammonia (5th ed.

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  • In the Polyesie the principal occupations are connected with the export of timber and firewood, the preparation of pitch, tar, potash and wooden wares, and boat-building.

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  • It has been shown b�arwin that, in the case of most animals and plants in a state of nature, the competition of other organisms is a tar more efficient agency in limiting their distribution than the mere influence of climate.

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  • Lake San Martin lies in a crooked deeply cut passage through the Andes, and the divide between its southern extremity (Laguna Tar) and Lake Viedma, which discharges through the Santa Cruz river into the Atlantic, is so slight as to warrant the hypothesis that this was once a strait between the two oceans.

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  • Tar is prepared largely from P. sylvestris; it is chiefly obtained from the roots, which, mingled with a few logs, are arranged in a conical or funnel-shaped hollow made on the steep side of a hill or bank; after filling up, the whole is covered with turf and fired at the top, when the tar exudes slowly and runs into aniron vessel placed below, from the spout of which it is conveyed into barrels.

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  • Most of the so-called Stockholm tar is thus prepared, chiefly in the province of Bothnia.

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  • These forests of pinaster, apart from the production of timber in a once treeless district, have a great economic value as a source of turpentine, which is largely obtained from the trees by a process analogous to that employed in its collection from P. sylvestris; the resin is yielded from May to the end of September, the cuts being renewed as the supply fails, until the tree is exhausted; the trunks are then felled and used in the manufacture of charcoal and lamp black; much tar and pitch is also obtained from these pinaster forests.

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  • Large quantities of tar and pitch are obtained from this species.

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  • This tree yields an abundant supply of tar and turpentine of good quality, which products are collected and manufactured in the " pine-barrens " on a large scale.

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  • In psoriasis the epidermis separates in flakes at various spots which have not been subjected to pressure, and to cure it ointment containing tar or other products of the dry distillation of wood is employed.

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  • The publicity given to this event renewed the scandal, and in November an attempt to "tar and feather" Mr Pigott resulted in two men being sent to prison.

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  • The town carries on an extensive trade in grain, flax, hemp, wood, tar and leather.

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  • Reinsch on distilling catechin (the juice of Mimosa catechu); occurs free in kino and in beechwood tar; its sulphonic acid is present in the urine of the horse and man.

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  • It results in the alkaline fusion of many resins, and may be prepared by fusing ortho-phenolsulphonic acid, o-chlorphenol, o-bromphenol, and o-phenoldisulphonic acid with potash, or, better, by heating its methyl ether, guaiacol, C 6 H 4 (OH) (OCH 3), a constituent of beechwood tar, with hydriodic acid.

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  • Guaiacol may be obtained directly from beechwood tar, from pyrocatechin by methylation with potash and potassium methyl sulphate at 180°, or from anisol by nitration, reduction of the ortho-nitroanisol to amino-anisol, which is then diazotized and boiled with water.

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  • There is some tanning, shipbuilding and brewing, and making of soap, tar and machinery.

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  • Three isomeric hydrocarbons of this formula exist; they occur in the light oil fraction of the coal: tar distillate, but they cannot be separated by fractional distillation owing to the closeness of their boiling points.

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  • As tar as is known (so much secrecy having been observed), the best results obtained in various places, save one, did not exceed 67% of the theoretical quantity, the remaining 33% of SO 2 having to be converted into sulphuric acid in the ordinary lead chambers.

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  • Early in November stock sheep having lost the distinguishing "burst" put on at clipping time with a large iron letter dipped in hot tar, have the distinctive paint or kiel mark claimed by the farm to which they belong rubbed on the wool.

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  • Concentrated sulphuric acid converts it into a deep red tar.

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  • Of artificial productions the most fruitful and important is provided by the destructive or dry distillation of many organic substances; familiar examples are the distillation of coal, which yields ordinary lighting gas, composed of gaseous hydrocarbons, and also coal tar, which, on subsequent fractional distillations, yields many liquid and solid hydrocarbons, all of high industrial value.

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  • Lord Dundonald, in 1787, whilst distilling coal for the production of tar and oil, noticed the formation of inflammable gas, and even used it for lighting the hall of Culross Abbey.

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  • If bituminous coal is distilled at a low tempera- Destruc- ture, the tar is found to contain considerable quantities of tive dis- light paraffin oils; and there is no doubt that paraffin tillation hydrocarbons are present in the original coal.

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  • Ethane, when heated to this degree, splits up into ethylene and hydrogen, whilst ethylene decomposes to methane and acetylene, and the acetylene at once polymerizes to benzene, styrolene, retene, &c. A portion also condenses, and at the same time loses some hydrogen, becoming naphthalene; and the compounds so formed by interactions amongst themselves build up the remainder of the hydrocarbons present in the coal tar, whilst the organic substances containing oxygen in the coal break down, and cause the formation of the phenols in the tar.

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  • Starting with a solid hydrocarbon of definite composition, it would be theoretically possible to decompose it entirely into carbon, hydrogen, ethylene and methane, and, by rapidly removing these from the heating zone before any secondary actions took place, to prevent formation of tar.

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  • Hence we find that the tar is formed of two distinct sets of products, the first due to incomplete decomposition and the second to secondary reactions due to the products of the decomposition being kept too long in the zone of heat.

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  • The formation of the second class of bodies is a great loss to the gas manufacturer, as, with the exception of the trace of benzene carried with the gas as vapour, these products are not only useless in the gas, but one of them, naphthalene, is a serious trouble, because any trace carried forward by the gas condenses with sudden changes of temperature, and causes obstructions in the service pipes, whilst their presence in the tar means the loss of a very large proportion of the illuminating constituents of the gas.

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  • The following table will give an approximate idea of the proportions which go to each Nitrogen as ammonia cyanogen in gas and combined in tar in coke .

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  • The effect produced by alteration in the temperature of the retort upon the composition of both gas and tar is very marked.

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  • The tar formed is affected to an even greater extent than the gas by alterations in the temperature at which the destructive distillation takes place.

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  • The lower the temperature, the smaller will be the volume of gas produced, and the lighter the specific gravity of the tar, whilst with increase of temperature, the volume of gas rapidly rises, and so does the specific gravity of the tar.

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  • Working with a caking coal Wright obtained the following results: - Analysis of the tar showed that the increase of the specific gravity was due to the increase in the quantity of pitch, which rose from 28.89 to 64.08% in the residuals; whilst the ammonia, naphtha and light oils steadily fell in quantity, the creosote and anthracene oils doing the same, but to a smaller extent.

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  • Naphthalene also begins to show in quantity in the tar as soon as the yield of gas reaches 10,000 cub.

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  • They may be divided into - (a) Solids, such as the coke and retort carbon; (b) liquids, consisting of the tar and ammoniacal liquor; and (c) gases, consisting of the unpurified `coal gas.

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  • 14.56 48 26.68 The liquid products of the destructive distillation of coal are tar and ammoniacal liquor.

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  • Tar derived from ordinary bituminous Liquid coal is a black, somewhat viscid liquid, varying in specific products.

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  • The ultimate composition of tar made in the London Gas Works is approximately as follows: Carbon Hydrogen Nitrogen Sulphur Oxygen .

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  • The most soluble of the constituents of crude coal gas is ammonia, 780 volumes of which are soluble in one volume of water at normal temperature and pressure, and the water in the hydraulic main absorbs a considerable quantity of this compound from the gas and helps to form the ammoniacal liquor, whilst, although the liquor is well agitated by the gas bubbling through it, a partial separation of tar from liquor is effected by gravitation.

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  • The tar and liquor when condensed have a dissolving action on various valuable light-giving constituents of the gas, which in the ordinary way would not be deposited by the lowering of temperature, and for this reason the heavy tar, and especially that produced in the hydraulic main, should come in contact with the gas as little as possible, and condensation should take place slowly.

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  • In water-cooled condensers it is usual to arrange that the water passes through a large number of small pipes contained in a larger one through which the gas flows, and as it constantly happened that condenser pipes became choked by naphthalene, the so-called reversible condenser, in which the stream of gas may be altered from time to time and the walls of the pipes cleaned by pumping tar over them, is a decided advance.

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  • The solubility of naphthalene by various oils has led some engineers to put in naphthalene washers, in which gas is brought into contact with a heavy tar oil or certain fractions distilled from it, the latter being previously mixed with some volatile hydrocarbon to replace in the gas those illuminating vapours which the oil dissolves out; and by fractional distillation of the washing oil the naphthalene and volatile hydrocarbons are afterwards recovered.

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  • Apart from the by-products coke, coke-breeze, tar and retort carbon, which are sold direct, gas companies are now in many cases preparing from their spent purifying material pure chemical products which are in great demand.

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  • Very many attempts have been made to utilize tar for Enrich- the production and enrichment of gas, and to do this meat by two methods may be adopted: tar.

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  • (a) Condensing the tar in the ordinary way, and afterwards using the whole or portions of it for cracking into a permanent gas.

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  • (b) Cracking the tar vapours before condensation by passing the gas and vapours through superheaters.

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  • If the first method be adopted, the trouble which presents itself is that the tar contains a high percentage of pitch, which tends rapidly to choke and clog up all the pipes.

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  • A partly successful attempt to make use of certain portions of the liquid products of distillation of coal before condensation by the second method was the Dinsmore process, in which the coal gas and vapours which, if allowed to cool, would form tar, were made to pass through a heated chamber, and a certain proportion of otherwise condensible hydrocarbons was thus converted into permanent gases.

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  • The final solution of the question of enrichment of gas by hydrocarbons derived from tar may be arrived at by a process which prevents the formation of part of the tar during the carbonization of the coal, or by the process devised by C. B.

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  • Enriching the gas by vapours and permanent gases obtained by decomposing the tar formed at the same time as the gas.

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  • of the tar and flue-dust is also condensed, which is of importance where bituminous coal is employed for firing.

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  • The spray of water removes the dust and part of the tar and ammonia from the gases, much steam being produced at the same time.

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  • Most of the liquor arriving at the bottom, after mechanically separating the tar, is pumped back into s, but a portion is always withdrawn and worked for ammonium sulphate.

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  • The hot water from B, freed from tar, is pumped into a third tower C, through which cold air is forced by means of a Root's blower by the pipe w.

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  • It is a light boat, oval in shape, and formed of canvas stretched on a framework of split and interwoven rods, and well-coated with tar and pitch to render it water-tight.

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  • There is a lively trade with St Petersburg, and the sea-borne exports, which consist chiefly of timber, flax, linseed, oats, flour, pitch, tar, skins and mats, amount in value to about 12 millions sterling annually (822% for timber), but the imports (mostly fish) are worth only about £ 200,000.

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  • They also investigated certain hydrocarbons occurring in the high boiling point fraction of the coal tar distillate and solved the constitution of phenanthrene.

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  • Homo-pyrocatechin is an isomer (CH 3: OH: OH= I: 3 : 4), found as its methyl ether (creosol) in beech-wood tar.

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  • This first step has led to the synthetical production of the most characteristic substances of essential oils in the laboratory, and the synthetical manufacture of essential oils bade fair to rival in importance the production of tar colours from the hydrocarbons obtained on distilling coal.

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  • Shipbuilding is carried on, and the forests yield timber, pitch and tar.

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  • - This includes a very large number of bodies chemically allied to benzol, such as carbolic acid, sulphocarbolates, creosote, wood tar, coal tar, oil of cade, thymol, salicylic acid, benzoic acid, naphthol, hydroquinon, cresol, guaiacol, ichthyol, saccharin and many others.

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  • Petroleum, or rather the heavy oils obtained in tar refineries, having an equal or superior heating power to coal-gas, may also be used in laboratories for producing high temperatures.

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  • The frozen sea beneath her feet was the color of tar, the black clouds above paused mid-swirl around a pop of blue sky in the storm's center.

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  • Koppers makes carbon pitch, coal tar distillates, and phthalic anhydride and ships products to customers in rail cars.

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  • Q. Do you still use hot bitumen (tar )?

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  • The Tar Tunnel A short distance from the China Museum, the tunnel is a source of natural bitumen.

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  • branding of low tar cigarettes, using implied health claim terms such as ' light ' or ' mild ' is completely unjustified.

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  • In 1848 the GLCC supplied tar to the Wylan Patent fuel Co, Greenwich, for making fuel briquettes with coal dust.

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  • caffeinated soap, Bug Away soap and Pine Tar soap.

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  • Doll's own pet theory had been tar on the roads, as tar is a known carcinogen.

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  • Recommendations: A policy of further tar reductions in manufactured cigarettes should be pursued without compromising the message of the importance of not smoking.

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  • As a result some highly dangerous forms of lung cancer actually appear to be higher in smokers of low tar cigarettes.

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  • coal tar dyes developed in a dazzling array for the textile industry.

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  • Inn 54 (B) " Along with the St Andrew's Hospital crockery a number of bottles containing coal tar were also excavated.

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  • Three petroleum pitches and three coal tar pitches were prepared from Ashland A240 and a soft coal tar pitches were prepared from Ashland A240 and a soft coal tar pitch, respectively.

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  • coal tar soap, nothing flowery scented that Kathy might get suspicious at.

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  • coal tar Paste BP containing strong coal tar solution 7.5% in zinc paste.

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  • coal tar products, dithranol or calcipotriol.

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  • coal tar dyes developed in a dazzling array for the textile industry.

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  • Coal tar dyestuffs Between 1820 and 1850 a great deal of research went on into the chemistry of coal tar dyestuffs Between 1820 and 1850 a great deal of research went on into the chemistry of coal tar.

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  • It is compressed using UNIX TAR archiving and Gzip compression.

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  • creosote derived from wood tar differs in composition from coal tar.

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  • crude tar itself, instead of selling it.

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  • departed wife, slumped in his chair like spillage from a barrel of tar.

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  • Koppers makes carbon pitch, coal tar distillates, and phthalic anhydride and ships products to customers in rail cars.

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  • This shows a familiarity with coal tar distillation that was probably acquired by practical experience within the GLCC.

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  • Bitumen Also called asphalt or tar, bitumen is the brown or black viscous residue from the vacuum distillation of crude petroleum.

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  • The tar distillers could not at first supply it in sufficient quantity or of the required purity.

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  • Coal tar dyestuffs Between 1820 and 1850 a great deal of research went on into the chemistry of coal tar.

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  • Grieve mentions that the antiseptic tar has been used internally as a stimulating expectorant in chronic bronchitis.

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  • flaming wooden barrels of burning tar on their backs.

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  • flip flop " charge would stick to him like feathers on tar.

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  • Were the Tory leader to change track now, Labor's " flip flop " charge would stick to him like feathers on tar.

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  • Installing UNiBACK from a file When you download the demo, it will be in compressed tar format.

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  • halfpenny worth of tar " .

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  • Disinfectants The list referred to above, highlights 17 active substances, including sodium hypochlorite and tar oils.

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  • Cigarette smoking, tar yields, and non-fatal myocardial infarction: 14,000 cases and 32,000 controls in the United Kingdom.

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  • These are not the only tar lichens present on the shore and they are difficult to distinguish from each other.

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  • The pavements are just cobbles, and tar macadam on the road was unknown.

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  • Cigarette smoking, tar yields, and non-fatal myocardial infarction: 14,000 cases and 32,000 controls in the United Kingdom.

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  • nicotine from cigarettes but die from the tar.

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  • Also, little polymerization of resins has occurred, so aromas and tastes are often less resinous and tar like than at later stages.

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  • Ist Coat of Arms: Argent, a chevron sable between three tar barrels sable flames issuant proper therefrom.

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  • The reserves in the Alberta tar sands are quoted at 180 billion barrels, bigger than that of every OPEC country except Saudi Arabia.

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  • If the scalp is very scaly then a shampoo containing coal tar or salicylic acid may help to remove it.

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  • Inside the cage were their feathers heaped like a black slag of tar.

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  • smokers of low tar cigarettes.

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  • The most exciting thing was Sid demanding coal tar soap, nothing flowery scented that Kathy might get suspicious at.

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  • Tartrazine, a dye made from coal tar, is also found in products such as fruit squash and sauces.

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  • sycamore leaves, it forms ' tar ' spot lesions, the number or diameter of which can be compared at different sites.

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  • The next morning there was a large hole in the road as the heat from the bonfire had melted the tar!

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  • By now the heat of the day was starting to burn the tarting to burn the tar on the roads.

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  • With water the fortunes are reversed the toffee beats the tar.

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  • In 1817, the GLCC decided to process all its crude tar itself, instead of selling it.

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  • There are historical records referring to the use of birch bark tar to relieve sore throats.

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  • Stretch'd along the deck like logs - Bear a hand, you jolly tar, you!

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  • tar -xvf comman on it.

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  • tar.gz | tar xf - then type make to compile the program.

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  • tar cigarettes.

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  • tar macadam on the road was unknown.

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  • tar distillers could not at first supply it in sufficient quantity or of the required purity.

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  • tar barrel incident equally rowdy goings on could be found in the villages around the town.

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  • Many of these stains were coal tar dyes developed in a dazzling array for the textile industry.

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  • Low tar cigarettes (defined as those yielding less than 10 mg tar) began to take an increasing market share.

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  • The tar reduction study: randomized trial of the effect of cigarette tar yield reduction on compensatory smoking.

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  • In the 19th century, fishermen still caulked (filled the gaps in) their boats with a mixture of pine tar and moss.

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  • wood creosote derived from wood tar differs in composition from coal tar.

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  • Another suggestion is that herbs or roots used to relieve toothache were pressed into tooth cavities using a piece of tar.

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  • Tar and Gemma's teenage years are essentially tragic: Burgess warns how this could be avoided.

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  • Pools of tar, like puddles of black sticky treacle had erupted on the roads in the City.

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  • unpacked using tar.

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  • unsealed hard floors such as concrete or tar macadam as this could damage the brush bar.

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  • These had also been bedded down on white lead and thick tar or pitch to keep the area watertight with cork filling all voids.

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  • Estimation of sales-weighted average tar and nicotine yields using the GHS as the source for brand market share.

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  • Zinc and Coal Tar Paste BP containing zinc oxide 6% and coal tar 6% .

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  • The trade is chiefly confined to the shipping of grain, fish, coal, malt and timber, with some cattle and wool, and to the import of coal and tar, but of late years it has declined, despite excellent wharf accommodation and a considerable depth of water (12-15 ft.).

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  • Pyrogallol dimethyl ether is found in beechwood tar.

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  • On the 16th of July 1893 the first little army of " New Australians " left Sydney in the " Royal Tar," which arrived at Montevideo on the 31st of August.

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  • mixture of gutta-percha, rosin and Stockholm tar).

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  • Jews, and elsewhere Russians,-to whom the peasants are for the most part in debt, as they purchase in advance on security of subsequent payments in corn, tar, wooden wares, &c. A good deal of the internal trade is carried on by travelling merchants.

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  • In that most largely used, known as " creosoting," dead oil of tar, to the amount of some 3 gallons per sleeper, is forced into the wood under pressure, or is sucked in by vacuum, both the timber and the oil being heated.

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  • PYRENE, C16H10, a hydrocarbon found together with chrysene in the last portion of the coal tar distillate, and also in "Stupp" fat.

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  • The crude solid product from the tar distillate is digested with carbon bisulphide to dissolve the pyrene, the solution filtered and the solvent evaporated.

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  • Pine stumps and waste limbs are utilized, notably at Hattiesburg, for the manufacture of charcoal, tar, creosote, turpentine, &c. Fisheries Fishing is a minor industry, confined for the most part to the Mississippi Sound and neighbouring waters and to the Mississippi and Yazoo rivers.

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  • The other principal rivers - the Cape Fear, the Neuse and the Tar - rise in the N.E.

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  • This habit can be used as a means of killing them, by placing boards or sacks covered with tar below the trees, which are then gently shaken.

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  • In '724 Hermann Boernaave referred to the oleum terrae of Burma, and "Barbados tar" was then well known as a medicinal agent.

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  • Among the principal varieties are those which contain carbolic acid and other ingredients of coal tar, salicylic acid, petroleum, borax, camphor, iodine, mercurial salts, sulphur and tannin.

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  • Imports include coal,timber, tar and hemp. Steam sawing, metal-founding, fish-salting, shipbuilding and repairing, and the manufacture of ship's-biscuits and fishing-nets are among the industries.

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  • The days on which the Pithoigia and Chas were celebrated were both regarded as Corotpbses (nefasti) and µcapai ("defiled"), necessitating expiatory libations; on them the souls of the dead came up from the underworld and walked abroad; people chewed leaves of whitethorn and besmeared their doors with tar to protect themselves from evil.

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  • PHENANTHRENE, C14H10, a hydrocarbon isomeric with anthracene, with which it occurs in the fraction of the coal tar distillate boiling between 270°-400° C. It may be separated from the anthracene oil by repeated fractional distillation, followed by fractional crystallization from alcohol (anthracene being the less soluble), and finally purified by oxidizing any residual anthracene with potassium bichromate and sulphuric acid (R.

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  • This page gives an overview of all articles in the 1911 Brittanica which are alphabetized under T to Tar.

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  • His great work Evvaywyai tar pucai, of which only about one-third has been preserved, was a medical encyclopaedia founded on extracts from Hippocrates, Galen, Dioscorides (fl.

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  • Tar), the gum-resin of the Balsamodendron Myrrha of the Somali country and opposite shore of Arabia; onycha (Heb.

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  • Crude petroleum and a thin tar, resulting from the process of enriching water-gas with petroleum, have been used ?

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  • The three isomeric cresols are found in the tar obtained in the destructive distillation of coal, beech-wood and pine.

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  • The crude cresol obtained from tar cannot be separated into its different constituents by fractional distillation, since the boiling points of the three isomers are very close together.

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  • The former includes electrodes, lamp carbons, &c. Coke, or some other form of amorphous carbon, is mixed with a little tar, and the required article moulded in a press or by a die.

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  • The higher olefines are found in the tar which is obtained by distilling bituminous shales, in illuminating gas, and among the products formed by distilling paraffin under pressure (T.

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  • He took out patents for lamps to burn oil of tar, for the propulsion of ships at sea, for facilitating excavation, mining and sinking, for rotary steam-engines and for other purposes; and so early as 1843 he was an advocate of the employment of steam and the screw propeller in warships.

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  • Owing to the pine forests pitch and tar were important manufactures in early times.

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  • Bueb (Congress of German Gas Industries, March 1900) brings gas (free from tar) into intimate contact with a saturated solution of ferrous sulphate, when a "cyanogen mud" is obtained.

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  • South Carolina and Georgia furnish the broadest and most typical section of this important physiographic province: here the more sandy and hilly interior parts are largely occupied by pine forests, which furnish much hard or yellow pine lumber, tar and turpentine.

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  • Coal and lignitic coal are the principal economic minerals met with in this central plain, though natural gas occurs and is put to use near Medicine Hat, and " tar sands " along the northeastern edge of the Cretaceous indicate the presence of petroleum.

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  • PAIGNTON, a seaside resort in the Torquay parliamentary division of Devonshire, England, on Tar Bay, 24 m.

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  • P. i., iiriv ir tar] 11] OfCJpeZ 6v fi ov Kai Ta W inrapxovra Ka6' avr6).

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  • from Nasibin in the north-east, bringing with it the waters of the many streams from the Tar `Abdin highlands; the north 'Awij, which at certain seasons brings much water due south from Mardin, and the main stream of the Khabur, which has come 60 m.

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  • In the pre-Persian period, besides those referred to elsewhere, we may cite Kashyari (Tar `Abdin), Guzanu (Gozan of 2 Kings xvii.

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  • The language is in most parts Arabic; but Turkish is spoken in Birejik and Urfa, Kurdish and Armenian south of Diarbekr, and some Syriac in Tar `Abdin.

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  • Materials like tar and pitch are sometimes employed as a matrix; they are used hot and without water, the solidifying action being due to cooling and to evaporation of the mineral oils contained in them.

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  • This purified oxide, mixed with sodium chloride and coal tar, was carbonized at a red heat, and ignited in a current of dry chlorine as long as vapours of the double chloride were given off, these being condensed in suitable chambers.

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  • But immediately above this level the charge is relatively viscous, because here the temperature has fallen so far that it is now at the melting or formation point of the slag, which therefore is pasty, liable to weld the whole mass together es so much tar would, and thus to obstruct the descent of the charge, or in short to " scaffold."

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  • siliceous; and the dephosphorizing or " Thomas " or " basic Bessemer " process, so called because the converter is lined with basic materials, usually calcined dolomite, a mixture of lime and magnesia, bound together with tar, and because the slag is made very basic by adding much i?`- -, - .1 -?=Woi krii fr ?`?'??-«:: e i h ..

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  • The lining of the converter is made of 90% of the mixture of lime and magnesia which results from calcining dolomite, (Ca,Mg)CO i, at a very high temperature, and 10% of coal tar freed from its water by heating.

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  • Tar, pitch, resin, ..

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  • tar peers, so as to prevent the resistance of the Upper el0ction Y P ?

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  • FLUORANTHENE, C15H10, also known as idryl, a hydrocarbon occurring with phenanthrene, pyrene, diphenyl, and other substances in "Stupp" fat (the fat obtained in working up the mercury ores in Idria), and also in the higher boiling fractions of the coal tar distillate.

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  • From the tar distillate, the chrysene can be fractionally precipitated, and the fluoranthene can be separated from most of the pyrene by fractional distillation in a partial vacuum.

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  • Bethell and patented by him in 1838, the timber is impregnated with oil of tar.

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  • Tar, pitch and turpentine are obtained from the wood of th's tree, which weighs from 30 to 38 lb per cub.

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  • Corn, tar, and especially timber are exported.

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  • Hot tar - Angus Smith's process - is used for water-pipes.

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  • His treatises Coal Tar and Ammonia (5th ed.

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  • In the Polyesie the principal occupations are connected with the export of timber and firewood, the preparation of pitch, tar, potash and wooden wares, and boat-building.

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  • It has been shown b�arwin that, in the case of most animals and plants in a state of nature, the competition of other organisms is a tar more efficient agency in limiting their distribution than the mere influence of climate.

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  • Lake San Martin lies in a crooked deeply cut passage through the Andes, and the divide between its southern extremity (Laguna Tar) and Lake Viedma, which discharges through the Santa Cruz river into the Atlantic, is so slight as to warrant the hypothesis that this was once a strait between the two oceans.

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  • Tar is prepared largely from P. sylvestris; it is chiefly obtained from the roots, which, mingled with a few logs, are arranged in a conical or funnel-shaped hollow made on the steep side of a hill or bank; after filling up, the whole is covered with turf and fired at the top, when the tar exudes slowly and runs into aniron vessel placed below, from the spout of which it is conveyed into barrels.

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  • Most of the so-called Stockholm tar is thus prepared, chiefly in the province of Bothnia.

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  • These forests of pinaster, apart from the production of timber in a once treeless district, have a great economic value as a source of turpentine, which is largely obtained from the trees by a process analogous to that employed in its collection from P. sylvestris; the resin is yielded from May to the end of September, the cuts being renewed as the supply fails, until the tree is exhausted; the trunks are then felled and used in the manufacture of charcoal and lamp black; much tar and pitch is also obtained from these pinaster forests.

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  • Large quantities of tar and pitch are obtained from this species.

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  • This tree yields an abundant supply of tar and turpentine of good quality, which products are collected and manufactured in the " pine-barrens " on a large scale.

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  • In psoriasis the epidermis separates in flakes at various spots which have not been subjected to pressure, and to cure it ointment containing tar or other products of the dry distillation of wood is employed.

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  • The publicity given to this event renewed the scandal, and in November an attempt to "tar and feather" Mr Pigott resulted in two men being sent to prison.

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  • The town carries on an extensive trade in grain, flax, hemp, wood, tar and leather.

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  • Reinsch on distilling catechin (the juice of Mimosa catechu); occurs free in kino and in beechwood tar; its sulphonic acid is present in the urine of the horse and man.

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  • It results in the alkaline fusion of many resins, and may be prepared by fusing ortho-phenolsulphonic acid, o-chlorphenol, o-bromphenol, and o-phenoldisulphonic acid with potash, or, better, by heating its methyl ether, guaiacol, C 6 H 4 (OH) (OCH 3), a constituent of beechwood tar, with hydriodic acid.

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  • Guaiacol may be obtained directly from beechwood tar, from pyrocatechin by methylation with potash and potassium methyl sulphate at 180°, or from anisol by nitration, reduction of the ortho-nitroanisol to amino-anisol, which is then diazotized and boiled with water.

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  • There is some tanning, shipbuilding and brewing, and making of soap, tar and machinery.

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  • Three isomeric hydrocarbons of this formula exist; they occur in the light oil fraction of the coal: tar distillate, but they cannot be separated by fractional distillation owing to the closeness of their boiling points.

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  • As tar as is known (so much secrecy having been observed), the best results obtained in various places, save one, did not exceed 67% of the theoretical quantity, the remaining 33% of SO 2 having to be converted into sulphuric acid in the ordinary lead chambers.

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  • Early in November stock sheep having lost the distinguishing "burst" put on at clipping time with a large iron letter dipped in hot tar, have the distinctive paint or kiel mark claimed by the farm to which they belong rubbed on the wool.

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  • Concentrated sulphuric acid converts it into a deep red tar.

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  • Of artificial productions the most fruitful and important is provided by the destructive or dry distillation of many organic substances; familiar examples are the distillation of coal, which yields ordinary lighting gas, composed of gaseous hydrocarbons, and also coal tar, which, on subsequent fractional distillations, yields many liquid and solid hydrocarbons, all of high industrial value.

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  • Lord Dundonald, in 1787, whilst distilling coal for the production of tar and oil, noticed the formation of inflammable gas, and even used it for lighting the hall of Culross Abbey.

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  • If bituminous coal is distilled at a low tempera- Destruc- ture, the tar is found to contain considerable quantities of tive dis- light paraffin oils; and there is no doubt that paraffin tillation hydrocarbons are present in the original coal.

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  • Ethane, when heated to this degree, splits up into ethylene and hydrogen, whilst ethylene decomposes to methane and acetylene, and the acetylene at once polymerizes to benzene, styrolene, retene, &c. A portion also condenses, and at the same time loses some hydrogen, becoming naphthalene; and the compounds so formed by interactions amongst themselves build up the remainder of the hydrocarbons present in the coal tar, whilst the organic substances containing oxygen in the coal break down, and cause the formation of the phenols in the tar.

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  • Starting with a solid hydrocarbon of definite composition, it would be theoretically possible to decompose it entirely into carbon, hydrogen, ethylene and methane, and, by rapidly removing these from the heating zone before any secondary actions took place, to prevent formation of tar.

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  • Hence we find that the tar is formed of two distinct sets of products, the first due to incomplete decomposition and the second to secondary reactions due to the products of the decomposition being kept too long in the zone of heat.

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  • The formation of the second class of bodies is a great loss to the gas manufacturer, as, with the exception of the trace of benzene carried with the gas as vapour, these products are not only useless in the gas, but one of them, naphthalene, is a serious trouble, because any trace carried forward by the gas condenses with sudden changes of temperature, and causes obstructions in the service pipes, whilst their presence in the tar means the loss of a very large proportion of the illuminating constituents of the gas.

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  • The following table will give an approximate idea of the proportions which go to each Nitrogen as ammonia cyanogen in gas and combined in tar in coke .

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  • The effect produced by alteration in the temperature of the retort upon the composition of both gas and tar is very marked.

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  • The tar formed is affected to an even greater extent than the gas by alterations in the temperature at which the destructive distillation takes place.

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  • The lower the temperature, the smaller will be the volume of gas produced, and the lighter the specific gravity of the tar, whilst with increase of temperature, the volume of gas rapidly rises, and so does the specific gravity of the tar.

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  • Working with a caking coal Wright obtained the following results: - Analysis of the tar showed that the increase of the specific gravity was due to the increase in the quantity of pitch, which rose from 28.89 to 64.08% in the residuals; whilst the ammonia, naphtha and light oils steadily fell in quantity, the creosote and anthracene oils doing the same, but to a smaller extent.

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  • Naphthalene also begins to show in quantity in the tar as soon as the yield of gas reaches 10,000 cub.

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  • They may be divided into - (a) Solids, such as the coke and retort carbon; (b) liquids, consisting of the tar and ammoniacal liquor; and (c) gases, consisting of the unpurified `coal gas.

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  • 14.56 48 26.68 The liquid products of the destructive distillation of coal are tar and ammoniacal liquor.

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  • Tar derived from ordinary bituminous Liquid coal is a black, somewhat viscid liquid, varying in specific products.

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  • The ultimate composition of tar made in the London Gas Works is approximately as follows: Carbon Hydrogen Nitrogen Sulphur Oxygen .

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  • 100.00 These elements in tar are built up into an enormous number of compounds (see Coal Tar), and its value as a by-product may be gathered from the fact that on fractional distillation it yields - (I) benzene and its homologues, from which aniline, the source of most of the coal-tar colours, can be derived; (2) carbolic acid, from which picric acid, used as a dye, a powerful explosive, and to give the bitter flavour to some kinds of beer, is made, also many most valuable disinfectants; (3) naphthalene, used for disinfecting, and also as the "Albo-carbon" employed in an enriching burner for gas; (4) pitch, extensively used in path-making, from which such bodies as anthracene and saccharin can be extracted.

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  • The most soluble of the constituents of crude coal gas is ammonia, 780 volumes of which are soluble in one volume of water at normal temperature and pressure, and the water in the hydraulic main absorbs a considerable quantity of this compound from the gas and helps to form the ammoniacal liquor, whilst, although the liquor is well agitated by the gas bubbling through it, a partial separation of tar from liquor is effected by gravitation.

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  • The tar and liquor when condensed have a dissolving action on various valuable light-giving constituents of the gas, which in the ordinary way would not be deposited by the lowering of temperature, and for this reason the heavy tar, and especially that produced in the hydraulic main, should come in contact with the gas as little as possible, and condensation should take place slowly.

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  • In water-cooled condensers it is usual to arrange that the water passes through a large number of small pipes contained in a larger one through which the gas flows, and as it constantly happened that condenser pipes became choked by naphthalene, the so-called reversible condenser, in which the stream of gas may be altered from time to time and the walls of the pipes cleaned by pumping tar over them, is a decided advance.

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  • The solubility of naphthalene by various oils has led some engineers to put in naphthalene washers, in which gas is brought into contact with a heavy tar oil or certain fractions distilled from it, the latter being previously mixed with some volatile hydrocarbon to replace in the gas those illuminating vapours which the oil dissolves out; and by fractional distillation of the washing oil the naphthalene and volatile hydrocarbons are afterwards recovered.

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  • Apart from the by-products coke, coke-breeze, tar and retort carbon, which are sold direct, gas companies are now in many cases preparing from their spent purifying material pure chemical products which are in great demand.

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  • Very many attempts have been made to utilize tar for Enrich- the production and enrichment of gas, and to do this meat by two methods may be adopted: tar.

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  • (a) Condensing the tar in the ordinary way, and afterwards using the whole or portions of it for cracking into a permanent gas.

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  • (b) Cracking the tar vapours before condensation by passing the gas and vapours through superheaters.

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  • If the first method be adopted, the trouble which presents itself is that the tar contains a high percentage of pitch, which tends rapidly to choke and clog up all the pipes.

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  • A partly successful attempt to make use of certain portions of the liquid products of distillation of coal before condensation by the second method was the Dinsmore process, in which the coal gas and vapours which, if allowed to cool, would form tar, were made to pass through a heated chamber, and a certain proportion of otherwise condensible hydrocarbons was thus converted into permanent gases.

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  • The final solution of the question of enrichment of gas by hydrocarbons derived from tar may be arrived at by a process which prevents the formation of part of the tar during the carbonization of the coal, or by the process devised by C. B.

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  • Tully and now in use at Truro, in which tar is injected into the incandescent fuel in a water-gas generator and enriches the water gas with methane and other hydrocarbons, the resulting pitch and carbon being filtered off by the column of coke through which the gas passes.

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  • Enriching the gas by vapours and permanent gases obtained by decomposing the tar formed at the same time as the gas.

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  • of the tar and flue-dust is also condensed, which is of importance where bituminous coal is employed for firing.

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  • The spray of water removes the dust and part of the tar and ammonia from the gases, much steam being produced at the same time.

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  • Most of the liquor arriving at the bottom, after mechanically separating the tar, is pumped back into s, but a portion is always withdrawn and worked for ammonium sulphate.

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  • The hot water from B, freed from tar, is pumped into a third tower C, through which cold air is forced by means of a Root's blower by the pipe w.

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  • It is a light boat, oval in shape, and formed of canvas stretched on a framework of split and interwoven rods, and well-coated with tar and pitch to render it water-tight.

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  • The hydrocarbon occurs in wood-tar and in petroleum, and is prepared commercially by fractional distillation of the light oil fraction of the coal-tar distillate (see Coal Tar).

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  • There is a lively trade with St Petersburg, and the sea-borne exports, which consist chiefly of timber, flax, linseed, oats, flour, pitch, tar, skins and mats, amount in value to about 12 millions sterling annually (822% for timber), but the imports (mostly fish) are worth only about £ 200,000.

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  • They also investigated certain hydrocarbons occurring in the high boiling point fraction of the coal tar distillate and solved the constitution of phenanthrene.

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  • Homo-pyrocatechin is an isomer (CH 3: OH: OH= I: 3 : 4), found as its methyl ether (creosol) in beech-wood tar.

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  • This first step has led to the synthetical production of the most characteristic substances of essential oils in the laboratory, and the synthetical manufacture of essential oils bade fair to rival in importance the production of tar colours from the hydrocarbons obtained on distilling coal.

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  • Shipbuilding is carried on, and the forests yield timber, pitch and tar.

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  • - This includes a very large number of bodies chemically allied to benzol, such as carbolic acid, sulphocarbolates, creosote, wood tar, coal tar, oil of cade, thymol, salicylic acid, benzoic acid, naphthol, hydroquinon, cresol, guaiacol, ichthyol, saccharin and many others.

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  • Petroleum, or rather the heavy oils obtained in tar refineries, having an equal or superior heating power to coal-gas, may also be used in laboratories for producing high temperatures.

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  • We've seen this: If you are running for president of the United States, merely using the words "freeze" and "Social Security" in the same sentence has the retirees of the nation heating up pots of tar and emptying their down pillows.

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  • Ist Coat of Arms: Argent, a chevron sable between three tar barrels sable flames issuant proper therefrom.

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  • The reserves in the Alberta tar sands are quoted at 180 billion barrels, bigger than that of every OPEC country except Saudi Arabia.

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  • If the scalp is very scaly then a shampoo containing coal tar or salicylic acid may help to remove it.

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  • Inside the cage were their feathers heaped like a black slag of tar.

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  • Tartrazine, a dye made from coal tar, is also found in products such as fruit squash and sauces.

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  • On sycamore leaves, it forms ' tar ' spot lesions, the number or diameter of which can be compared at different sites.

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  • The next morning there was a large hole in the road as the heat from the bonfire had melted the tar !

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  • By now the heat of the day was starting to burn the tar on the roads.

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  • With water the fortunes are reversed the toffee beats the tar.

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  • There are historical records referring to the use of birch bark tar to relieve sore throats.

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  • Stretch 'd along the deck like logs - Bear a hand, you jolly tar, you !

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  • Unpacked it with gunzip and the run the tar -xvf comman on it.

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  • Use gunzip -c filename.tar.gz | tar xf - then type make to compile the program.

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  • There 's been a move toward low tar cigarettes.

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  • The pavements are cobbles, and tar macadam on the road was unknown.

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  • In the same era that spawned the Newark tar barrel incident equally rowdy goings on could be found in the villages around the town.

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  • The tar reduction study: randomized trial of the effect of cigarette tar yield reduction on compensatory smoking.

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  • In the 19th century, fishermen still caulked (filled the gaps in) their boats with a mixture of pine tar and moss.

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  • Another suggestion is that herbs or roots used to relieve toothache were pressed into tooth cavities using a piece of tar.

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  • Tar and Gemma 's teenage years are essentially tragic: Burgess warns how this could be avoided.

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  • Pools of tar, like puddles of black sticky treacle had erupted on the roads in the City.

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  • Create a subdirectory to hold the source files once they are unpacked using tar.

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  • Avoid rough or unsealed hard floors such as concrete or tar macadam as this could damage the brush bar.

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  • An increased risk of skin cancer in psoriatic patients treated with a combination of coal tar and UVB radiation has been reported.

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  • These had also been bedded down on white lead and thick tar or pitch to keep the area watertight with cork filling all voids.

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  • Estimation of sales-weighted average tar and nicotine yields using the GHS as the source for brand market share.

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  • Zinc and Coal Tar Paste BP containing zinc oxide 6% and coal tar 6 %.

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  • If you use a real Christmas tree, not only is the pine tar toxic to your cats, but the needles are a danger for felines because they could puncture your cat's intestine if swallowed.

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  • There are several sources for oil including shale, tar sands and the liquid petroleum that is refined into several types of fuel.

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  • Twenty, filtered menthol cigarettes, jam packed with nicotine, tar, embalming fluid, and couple hundred more flavorful low-dosed toxic deadly poisons.

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  • She was very disappointed in us but she knew that it was basically nothing she could do because we were big young boys and officially addicted to inhaling nicotine, tar and about 400 other low dose poisons.

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  • They have the consistency of tar and smell very foul.

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  • The most common diseases are anthracnose, phyllosticta and tar spot.

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  • The third most common maple tree leaf disease is tar spot.

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  • Description: As its name implies, tar spot disease looks like big black tar spots on the top of the leaves.

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  • Prevention: Raking up fallen leaves will also keep tar spot at bay.

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  • Don't get caught in his lullaby, because he will put you to sleep... and then beat the tar out of you.

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  • The mouth starts slightly chewy but softens with ripe cherry and cassis flavors that take a side step with hints of chocolate and tar.

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  • It is smooth and syrupy with blackberry and plum fruit that is complemented with chocolate liqueur with some tar and tobacco bits thrown in.

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  • Dark and rich with black licorice, black tar, black cherries - think black - think big - think GOOOOD.

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  • The Tar Heel State has a reputation for being home to some of the most scenic camping spots in the United States.

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  • The Tar Heel state boasts an extensive network of state parks, many of which are home to beautiful campgrounds that make perfect vacation spots for backpackers as well as those who enjoy improved tent or RV camping.

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  • Eczema and other skin diseases can be treated with an ointment that contains a derivative of coal tar.

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  • Parts of the coal tar are volatile, so the bathroom should be well ventilated.

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  • Aftershave lotions, sunscreens, and certain topical sulfa drugs may be changed into allergens, while coal tar and certain oils used in manufacturing may become irritants after light exposure.

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  • Smoke from a cigarette, pipe, or cigar is made up of many additional toxic chemicals, including tar and carbon monoxide.

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  • Tar is a sticky substance that forms as deposits in the lungs, causing lung cancer and respiratory distress.

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  • Besides tar, nicotine, and carbon monoxide, tobacco smoke contains 4,000 different chemicals.

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  • Some brands of cigarettes are advertised as low tar, but no cigarette is truly safe.

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  • Other treatments that are sometimes used for atopic dermatitis are tar preparations and ultraviolet light therapy (phototherapy).

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  • Tar preparations are messy but were still as of 2004 considered useful for treating patients with chronic lichenified areas of skin.

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  • Additionally people willing to walk the beaches and pick up tar balls and clean up oil that finds its way to land.

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  • Once cooled, any tar or carbon buildup should be trimmed from the wick.

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  • To remove more difficult stains, such as tar, shoe polish or markers, Pergo recommends using acetone or nail polish remover.

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  • It smells like a cross between a pine tree and tar; however, if you use the oil in a diluted form, the odor will disappear in about an hour.

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  • The Saracens would throw glass bombs containing naphtha, a product of boiling petroleum or coal tar, over the walls of the city.

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  • The other principal rivers - the Cape Fear, the Neuse and the Tar - rise in the N.E.

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  • This habit can be used as a means of killing them, by placing boards or sacks covered with tar below the trees, which are then gently shaken.

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  • In '724 Hermann Boernaave referred to the oleum terrae of Burma, and "Barbados tar" was then well known as a medicinal agent.

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  • Among the principal varieties are those which contain carbolic acid and other ingredients of coal tar, salicylic acid, petroleum, borax, camphor, iodine, mercurial salts, sulphur and tannin.

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  • Imports include coal,timber, tar and hemp. Steam sawing, metal-founding, fish-salting, shipbuilding and repairing, and the manufacture of ship's-biscuits and fishing-nets are among the industries.

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  • The days on which the Pithoigia and Chas were celebrated were both regarded as Corotpbses (nefasti) and µcapai ("defiled"), necessitating expiatory libations; on them the souls of the dead came up from the underworld and walked abroad; people chewed leaves of whitethorn and besmeared their doors with tar to protect themselves from evil.

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  • PHENANTHRENE, C14H10, a hydrocarbon isomeric with anthracene, with which it occurs in the fraction of the coal tar distillate boiling between 270°-400° C. It may be separated from the anthracene oil by repeated fractional distillation, followed by fractional crystallization from alcohol (anthracene being the less soluble), and finally purified by oxidizing any residual anthracene with potassium bichromate and sulphuric acid (R.

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  • His great work Evvaywyai tar pucai, of which only about one-third has been preserved, was a medical encyclopaedia founded on extracts from Hippocrates, Galen, Dioscorides (fl.

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  • Tar), the gum-resin of the Balsamodendron Myrrha of the Somali country and opposite shore of Arabia; onycha (Heb.

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  • Crude petroleum and a thin tar, resulting from the process of enriching water-gas with petroleum, have been used ?

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  • STYROLENE, C 6 H 5 CH:CH 2, also known as phenylethylene or vinylbenzene, an aromatic hydrocarbon found to the extent of 1 to 4% in storax; it also occurs with crude xylene in coal tar fractions.

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  • The three isomeric cresols are found in the tar obtained in the destructive distillation of coal, beech-wood and pine.

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  • The crude cresol obtained from tar cannot be separated into its different constituents by fractional distillation, since the boiling points of the three isomers are very close together.

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  • The former includes electrodes, lamp carbons, &c. Coke, or some other form of amorphous carbon, is mixed with a little tar, and the required article moulded in a press or by a die.

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  • STYROLENE, C 6 H 5 CH:CH 2, also known as phenylethylene or vinylbenzene, an aromatic hydrocarbon found to the extent of 1 to 4% in storax; it also occurs with crude xylene in coal tar fractions.

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