Perforated Sentence Examples
The wall between them is perforated, giving passage to coarse strands of protoplasm.
With another form of gas stove coke is used in place of the perforated asbestos; the fire is started with the gas, which, when the coke is well alight, may be dispensed with, and the fire kept up with coke in the usual way.
It is evident that accurate knowledge of the character and structure of the rock-formations in petroliferous territories is of the greatest importance in enabling the expert to select favourable sites for drilling operations; hence on well-conducted petroleumproperties it is now customary to note the character and thickness of the strata perforated by the drill, so that a complete section may be prepared from the recorded data.
Above is a graceful balustrade behind which is a lofty roof, and at the angles are towers perforated for the passage of the light.
Bryan, in which the analytical equations of motion are deduced of a perforated solid in liquid, from considerations purely hydrodynamical.Advertisement
The melting pans are generally circular vessels, fitted with a perforated false bottom, on which the sugar to be melted is dumped.
The bottom of a crucible is perforated by a pipe which projects into the crucible to about two-thirds of its height.
When the bud is nearly complete, the body-wall of the parent immediately below it becomes perforated, placing the coelenteric cavity of the parent in secondary communication with that of the bud (H), doubtless for the better nutrition of the latter.
Cells of this type are often called trumpet-hyphae (though they have no connection with the hyphae of Fungi), and in some genera of Laminariaceae those at the periphery of the medulla simulate the sieve-tubes of the higher plants in a striking degree, even (like these latter) developing the peculiar substance callose on or in the perforated cross-walls or sieve-plates.
For pumping a well a valved working-barrel with valved sucker is attached to the lower end of the tubing, a perforated " anchor " being placed below.Advertisement
This apparatus has an oil-cup consisting of a cylindrical brass or gunmetal vessel, the cover of which is provided with three rectangular holes which may be closed and opened by means of a perforated slide moving in grooves; the movement of the slide causes a small oscillating colzaor rape-oil lamp to be tilted so that the flame (of specified size) is brought just below the surface of the lid.
Most of these are perforated for mounting on threads or wires, and had been, no doubt, originally connected together to form one or more of the elaborate girdles, necklaces and breast ornaments then worn by the women.3 On the bottom of the stone box there was similar dust, pieces of bone and jewelry, and also remains of what had been vessels of wood.
A third method consists in placing the specimen within bibulous paper, and enclosing the whole between two plates of coarsely perforated zinc supported in a wooden frame.
Solid impurities speedily become crushed, and are carried away by the water, while the rubber takes the form of an irregular sheet perforated by numerous holes.
Small objects are often heaped together in perforated trays or ladles, the cathode connecting-rod being buried in the midst of them.Advertisement
In front of the naked eye was held a piece of copper foil perforated by a fine needle hole.
It revolves with the smallest possible clearance in a chamber of masonry, one of the side walls being perforated by a large round hole, through which the air from the mine is admitted to the centre of the fan.
The Suidae include the Old World pigs (Suinae) and the American peccaries (Dicotylinae), and are characterized by the snout terminating in a fleshy disk-like expansion, in the midst of which are perforated the nostrils; while the toes are enclosed in sharp hoofs, of which the lateral ones do not touch the ground.
At any rate stones were sawed, shaped, polished, carved and perforated, not only by the Mexicans, but among other tribes.
Bunsen may be regarded as the originator of the second method, and it was he who devised the small cone of platinum foil, sometimes replaced by a cone of parchment perforated with pinholes, arranged at the apex of the funnel to serve as a support for the paper, which is apt to burst under the pressure differences.Advertisement
In the so-called "Buchner funnel," the filtering vessel is cylindrical, and the paper receives support by being laid upon its flat perforated bottom.
C. Gooch, which has come into common use in quantitative analysis where the solid matter has to be submitted to heating or ignition, consists of a crucible having a perforated bottom.
By means of a piece of stretched rubber tubing, this crucible is supported in the mouth of an ordinary funnel which is connected with an exhausting apparatus; and water holding in suspension fine scrapings of asbestos, purified by boiling with strong hydrochloric acid and washing with water, is run through it, so that the perforated bottom is covered with a layer of felted asbestos.
A perforated cone, similarly coated with asbestos and fitted into a conical funnel, is sometimes employed.
The material is placed in a perforated cage or "basket," which is enclosed in an outer casing, and when the cage is rapidly rotated by suitable gearing, the liquid portions are forced out into the external casing.Advertisement
When the armature is rotated, these two coils endeavour to place themselves in certain directions in the field so as to be perforated by the greatest magnetic flux.
A still simpler form of siren may be constituted with a good spinning-top, a perforated card disk, and a tube for blowing with.
During electrolysis, oxygen is evolved at the anode and escapes from the outer vessel, while the sodium deposited in globules on the cathode floats upwards into the iron cylinder, within which it accumulates, and from which it may be removed at intervals by means of a perforated iron ladle, the fused salt, but not the metal, being able to pass freely through the perforations.
A pair of coiled nephridial tubes (n) formed of a file of perforated `' drain-pipe "cells, with ciliated tag-like" flame "cells (f), open into a contractile bladder (bl), FIG.
Bdelloidaceae; foot with two toes and accessory spurs or a simple perforated disk; body telescopic at either end, with an antero-dorsal proboscis ending in a ciliate cup and bearing the proximal antenna; corona usually bilobed, very wheel-like.
Body elongated with a narrow neck above the disk; foot ending in a terminal perforated disk.
Anomiidae.-Foot small; inferior (right) valve of adult perforated to allow passage of the byssus.
They agree with primitive nephridia in being of ectodermic origin, in consisting of perforated cells in linear series, and in having no communication with the coelom.
Smaller pieces are thrown into a bath of melted carnallite and pressed together with an iron rod, the bath being then heated until the globules of metal float to the top, when they may be removed in perforated iron ladles, through the holes in which the fused chloride can drain away, but through which the melted magnesium cannot pass by reason of its high surface tension.
A piston made of such a perforated substance, therefore, may be used to exert pressure on the liquid, while all the time the vapour is able to pass.
By evaporation and condensation, then, the solvent can pass through this perforated partition, which thus acts as a perfect semi-permeable membrane.
Spores usually two-celled, either with a strongly thickened cross-wall often perforated by a narrow canal or with crosswall only slightly thickened.
In Merulius lacrymans Hartig has observed thin-walled hyphae with large lumina, the septa of which are perforated like those of sieve-tubes.
The disintegrated ground is then brought back in the trucks and fed through perforated cylinders into the washing pans; the hard blue which has resisted disintegration on the floors, and the lumps which are too big to pass the cylindrical sieves, are crushed before going to the pans.
Ornaments of perforated teeth and shells are found.
Agarum, Claudea and Struvea are leaf-forms which are perforated like Aldrovanda among flowering plants.
The air-pipe goes right to the bottom of the cylinder and there branches out into perforated side-pipes, so that the mass is thoroughly stirred up all the time.
It is continued until the contents of the pan have been coverted into a thick paste of small crystals of monohydrated sodium carbonate, permeated by a mother-liquor which is removed by draining on perforated plates or by a centrifugal machine, and is always returned to the pans.
This arrangement has the effect that the salts, as they separate out, slide down the sloping part and arrive in the central channel, which is not exposed to the fire-gases, so that they quietly settle there, without caking to the pan, until they are fished out by means of perforated ladles.
This is a tall iron erection, built up from superposed cylinders, which are separated from one another by perforated horizontal diaphragms, con this recovery is carried out in the most efficient manner, the process cannot possibly pay; but so much progress has been made in this direction that the loss of ammonia is very slight indeed, merely a fraction per cent.
Both these reactions are carried out in tall cylindrical columns or " stills," consisting of a number of superposed cylinders, having perforated horizontal partitions, and provided with a steam-heating arrangement in the enlarged bottom portion.
Perforated and otherwise prepared rubber, as well as wire-woven material, are also largely utilized for door and floor mats.
Indeed there is hardly a village in India which cannot boast of a shrine dedicated to Siva, and containing the emblem of his reproductive power; for almost the only form in which the" Great God "is adored is the Linga, consisting usually of an upright cylindrical block of marble or other stone, mostly resting on a circular perforated slab.
The perforated pharyngeal region has then been detached from the adherent epipleura or opercular folds (wall of atrial or branchial chamber) by cutting the fluted pharyngo-pleural membrane d, and separated by a vertical cut from the intestinal region.
The first part of the alimentary canal consists of the pharynx or branchial sac, the side walls of which are perforated by upwards of sixty pairs of elongated slits, the gill-clefts.
The perforated pharynx terminates some distance in front of the atriopore.
The apparatus consists of a tank with two chambers, the partition being perforated.
Fresh water is allowed to enter the lower chamber immediately under the perforated partition.
When the operation is completed, the whole of the water is run off, and the flax remains on the perforated floor, where it drains thoroughly before being removed to dry.
The " megalithic " monuments of Agia Phaneromeni 1 and Hala Sultan Teke near Larnaca may perhaps be early, like the Palestinian cromlechs; but the vaulted chamber of Agia Katrina near Enkomi seems to be Mycenaean or later; and the perforated monoliths at Ktima seem to belong to oil presses of uncertain but probably not prehistoric date.
By introducing perforated shields of ebonite between the electrodes, so that the full current-density was only attained at the centres of the jets, these ill effects could be prevented.
Enveloped in a huge blue sheet, with a yard of linen as a veil perforated for two inches square with minute holes, the feet thrust into two huge bags of colored stuff, a wife is perfectly unrecognizable, even by her husband, when out of doors.
Four varieties of poppy are distinguished - two with white flowers, large oval capsules without holes under their " combs " (stigmas) and bearing respectively yellow and white seed, and the other two having red or purple flowers and seeds of the same colour, one bearing small capsules, perforated at the top, and the other larger oval capsules not perforated.
Uncemented brickwork, or perforated ironwork, are xxvill.
The new Kessler furnace is a very ingenious apparatus, in which the fire from a gas-producer travels over the sulphuric acid contained in a trough made of Volvic lava, and surmounted by a number of perforated plates, over which fresh acid is constantly running down; the temperature is kept down by the production of a partial vacuum, which greatly promotes the volatilization of the water, whilst retarding that of the acid.
Corals have been divided into A porosa and Perforata, according as the theca and septa are compact and solid, or are perforated by pores containing canals lined by endoderm.
A perforated spur, with a special secreting gland in connexion with it, is found attached to each hind-leg of the males of the existing species of Monotremata.
The ticket is made up of as many coloured sheets as there are party organizations (plus one for independent nominations), and the name of each candidate is on a perforated slip, which must be detached if it is to be voted.
Without parapodial jaws; without the addition of originally post-oral somites to the prae-oral region, which is a simple prostomial lobe of the first somite; the first somite is perforated by the mouth and its parapodia are not modified as jaws.
With a single pair of parapodial jaws carried by the somite which is perforated by the mouth; this is not the first somite, but the second.
The base of the cranium is long and narrow; the alisphenoid is very obliquely perforated by the foramen rotundum, but the foramen ovale is confluent with the large foramen lacerum medium behind.
In the hind-leg, the perforated tendon is a continuation of that of the plantaris, passing pulley-wise over the tuberosity of the calcaneum.
At each extremity of the box a bag of oil-meal was placed between two perforated iron plates, next to which were inserted filling-up pieces of wood, two of which were oblique, so that the wedges which exercised the pressure could be readily driven home.
The presses having perforated cylinders, although presenting mechanically a more perfect arrangement, are not preferable to the press cages formed by staves, as the holes become easily clogged up by the meal, when the cylinder must be carefully cleaned out.
Embolomeri, with the centra and intercentra equally developed disks, of which there are thus two to each neural arch; these disks perforated in the middle for the passage of the notochord.
Deville's portable blast furnace is very similar in principle to the above, but the body of the furnace is formed of a single cast iron cylinder lined with fireclay, closed below by a cast iron plate perforated by a ring of small holes - a hemispherical basin below forming the air-heating chamber.
Intra-abdominal abscesses are an infrequent complication, particularly seen in those with perforated appendicitis.
Unfortunately, Treves ' youngest daughter died from perforated appendicitis.
They are supplied in perforated unit dose blisters packed in cartons containing 14, 28 or 49 tablets.
This was initially rejected and caused him to suffer a perforated bowel.
Be there or be square like some perforated hanging chad, ignored in the next count!
She was taken to the Royal London where she was treated for perforated ear drums and cuts and grazes.
She was noted to have an intact red drum on the right side and a perforated eardrum on the left.
It uses an industry standard fully perforated drum which signals a new era in the choice of coating machines.
There was a hatch with still movable iron hinges on the deck, and the side were also perforated.
Both had perforated at the site forming an abscess cavity.
The center of the anode has become perforated due to bombardment by electrons.
The display uses a permanent magnet that is perforated to provide an aperture for each pixel.
Its only resemblance to other chordates is its large pharynx perforated with gill slits and used for feeding.
Concealed perforated pipes hidden below the water line would have spewed gasoline and then the floating fuel would have been ignited.
Classroom partition walls have perforated plasterboard with integrated absorption and high room to room sound reduction.
As soon as they float to the top, remove them with a perforated spoon.
The black pipe at the top of the opening is perforated on the firebox side and supplies clinker control steam.
Tall column heels, £ 48.00 Black leather 80's petal perforated stiletto shoes Classic 80's black leather stiletto shoes with a pretty feminine twist.
Routine use of laparoscopic repair for perforated peptic ulcer.
The vertical service columns are yellow, and white perforated steel wall panels protect the filters for a displacement ventilation system.
In this way several thicknesses of paper can be perforated at the same time, which is a great convenience for press work, since copies of the same message have often to be transmitted to several newspapers at the same time.
This is Prajapati, and the sacrificer, who when regenerated will pass upwards through the three worlds to the realms of light, naturally perforated bricks being for this purpose placed in the middle of the three principal altar-layers.
The surface of the coenosteum is covered by a layer of common ectoderm, containing large nematocysts, and is perforated by pores of two kinds, gastropores and dactylopores, giving exit to gastrozoids and dactylozoids respectively, which are lodged in vertical pore-canals of wider calibre than the coenosarcal canals of the general net 'work.
The aeration of the water is effected by blowing air into the steam before it is condensed; as an auxiliary, the storage tanks have a false bottom perforated by fine holes so that if air be injected below it, the water is efficiently aerated by the air which traverses it in fine streams. After condensation the water is filtered through charcoal.
Water is poured on the dirt, and the rocking motion imparted to the cradle causes the finer particles to pass through the perforated bottom on to a canvas screen, and thence to the base of the cradle, where the auriferous particles accumulate on transverse bars of wood, called " riffles."
It was concluded that H. pylori eradication reduces ulcer recurrence in patients with H. pylori associated perforated duodenal ulceration.
Roller shutter doors can be perforated, colored, galvanized.
Business cards can be printed -- using your computer and an inkjet or laser printer -- onto perforated business card stock available from your local office supply store.
Many of these cards will look like you printed them out on a PC, because the cards' perforated edges are rough and the printing method is apparent to anyone given these cards.
You'll also find an amazingly versatile shirt dress and perforated jelly flats.
Colbert is deaf in his right ear, the result of damage during surgery that was meant to repair a perforated eardrum.
Many collars are adjustable, either with a rigid slide buckle or perforated belt-style buckles, allowing owners to adjust the collar's fit as their pet grows.
I keep a perforated zinc collar round the crown and protect from spring frosts.
To protect it against slugs, which are too fond of it, strips of perforated zinc, about 3 inches wide, bent so as to form rings round the plants, are used.
This shirt has a contrasting mesh panel at the shoulders and perforated fabric at the strategic sweat points of the shoulders, underarms and back, so that you can enjoy maximum breathability all day.
A popular type of foundation garment today, panty girdles have undergone many changes since the first ones, made of perforated rubber, were introduced into the fashion world in the 1930s.
First is the Perforated Leather Aviator.
This is a metal aviator with (amazingly!), a perforated leather arm.
In truth, however, these glasses are perforated lenses that are designed to allow only direct, and appropriate, light rays to filter into the eyes.
If any of the instilled dye leaks into the eye, then the cornea has been perforated and a small projectile may be inside the eye.
If the cornea has been perforated, then the patient is referred to a corneal specialist for surgery.
In addition, an open reduction is necessary if the child has a septal hematoma or an open fracture in which the skin has been perforated.
A perforated eardrum (tympanum perforation) is an opening or rupture in the eardrum (tympanic membrane), the thin membrane that separates the outer ear canal from the middle ear.
A perforated eardrum may be caused by infection, trauma, or negative pressure from underwater diving or an airplane flight.
Perforated eardrum occurs commonly in people of all ages; it is especially common in early childhood when children are exposed regularly to colds and upper respiratory infections in their contact with other children.
Middle ear infection, the most frequent cause of perforated eardrum, is the most prevalent reported illness in children between six months and 20 months of age.
Treatment of a perforated eardrum is aimed at relieving pain or pressure behind the eardrum, treating any infection of the ear itself or of the upper respiratory tract, and restoring hearing.
While a perforated eardrum may be uncomfortable, it usually heals on its own within two months.
A perforated eardrum can be prevented by avoiding insertion of any object into the ear to clean it or to remove earwax (cerumen).
Preventing ear infection is the primary way to prevent a perforated eardrum.
The device looks like a pipe containing an inner cone that cradles a steel ball sealed with a perforated cover.
Once the appendix is perforated, bacteria-filled fluid is released into the abdominal cavity and peritonitis then develops.
A child with a perforated appendix and peritonitis must remain in the hospital up to a week.
Perforated and ruptured appendix, as well as peritonitis, occur at higher rates among children.
The fabric of the suits is perforated with thousands of micro holes than are nearly invisible to the naked eye, yet they let enough of the sun's rays through to give you a line-free tan.
Foil shavers feature one or two floating heads which have oscillating cutters behind a perforated screen.
Lastly, you'll find two side pockets, one of which is mesh and another that is pleated, as well as hook-and-loop closures that are curve-cut and perforated for "catch-free" use.
Typically, one shade of vinyl will serve as the sides of the back and then the perforated plastic in a contrasting color will go over that.
The upper and arch are made of ventilated mesh and the leather is perforated for extra ventilation.
There is also a perforated metallic leather toe cap, heel overlay and collar lining.
They are rubber, of course, and perforated at the instep for ventilation.
It's perforated for comfort and breathability and has a padded collar.
They have a textile lining, rugged rubber outsole and perforated quarter panel.
Designed in collaboration with Joy & Alexandre Herchcvitch, the shoes look every bit true to their brogue inspiration, complete with perforated dots, laces and a dainty shape.
It is Made up of Steel along with Black Dial, Automatic Movement, Black Perforated Calfskin Strap with 50 Meters / 100 Feet Water Resistant and Luminescent Hands & Markers sets the timepiece apart.
The fabulous looking Silver Dial with Automatic Movement, Plexiglas Crystal, Polished Case, Black Perforated Leather Strap, 50 Meters / 100 Feet Water Resistant and Luminescent Hands & Markers comes with lot more refinement.
Covered with a Black perforated leather strap and Stainless steel, Black dial it has a groovy Display second time zone, wide squared Date at 3, Sapphire crystal, Deployment buckle with Water resistant to 30m/99ft.
This Brand New Men's Model in an elegant Leather Box & Manual, Silver Dial, Scratch Resistant Sapphire Crystal, and Steel Case & Black Perforated Leather Strap.
As the ear drum can be perforated by noises over 160 decibels it is important not to use alarms or other ring tones that are excessively loud.
The first is to buy perforated business card stock at your local office supply store and print the cards on your home computer.
The paper is perforated, and the cards come out with little rough edges where they used to be connected to the sheet.
The stock itself is perforated, which Southworth claims separates easily producing smooth edges.
This will require some expertise and costs because no matter how careful you are, some of the perforated sheets will not print straight.
There are sheets of perforated business cards available at any Staples or Office Depot.
In most cases you will pay far less than if you use card stock already designed for you or perforated cards.
Purchase specially made, perforated business card paper at an office supply store, click print, and carefully detach the cards.
Using a perforated business card stock makes separating the cards simple.
Office supply stores sell perforated business card sheets which usually hold up to six cards on one 8 ½ x 11 page.
They also make various paper products such as perforated business card sheets.
The molds used in French cheese making are perforated and called faisselles.
While Michelle Duggar remained hospitalized to recover from her own health issues, baby Josie suffered a perforated bowel at only eight days old.
At Magdalen College, Oxford, is one which is perforated, and has a most beautiful effect.
They usually take the form of cast iron open stoves fitted with a number of Bunsen burners which heat perforated lumps of asbestos.
The temples on the east side of the Otolum are distinguished by tall narrow vaults, perforated by numerous square openings giving the appearance of coarse lattice work.
A and A' carry two light vertical rods S, M, the one as much in front of the other as there is space between two successive holes in the perforated ribbon.
In Squier and Crehore's " Synchronograph " system " sine waves of current, instead of sharp " makes and breaks," or sharp reversals, are employed for transmitting signals, the waves being produced by an alternating-current dynamo, and regulated by means of a perforated paper ribbon, as in the Wheatstone automatic system.
In the Murray system the messages are first prepared in the form of a strip of perforated paper about half an inch wide.
The messages in the form of perforated tape are then passed through an automatic transmitter, something like a Wheatstone transmitter, at a speed of about 100 words a minute.
This received perforated tape is then used to control what is known as the printer or automatic typewriter, a machine that translates the tape perforations into letters and prints the messages in Roman type in page form.
As in some other systems retransmission is effected from the received perforated tape.
The peculiar substance called callose, chemically allied to cellulose, is frequently formed over the surface of the perforated end-walls.
Sieve Tubes.The sieve tubes consist of partially fused rows of cells, the transverse cr lateral walls being perforated by minute openings, through which the contents of the cells are connected with each other, and which after a certain time become closed by,the formation of callus on the sieve plates.
The lacrymal is always present, and perforated by a glandular duct.
The three middle metatarsals become fused together into a cannon bone; the upper part of the third middle metatarsal projects behind and forms the so-called hypotarsus, which in various ways, characteristic of the different groups of birds (with one or more sulci, grooved or perforated), acts as guiding pulley to the tendons of the flexor muscles of the toes.
The nephridia are like those of the Oligochaeta in general structure; that is to say, they consist of drain-pipe cells which are placed end to end and are perforated by their duct.
Fissurella, mantle and shell perforated at apex, British.
This paired organ consists of a string of cells which are perforated by a duct opening to the exterior and ending internally in a flame-cell.
At some distance from the shaft a square water-tight wall was built, and the space between it and the shaft was filled in with sand, which was purified of all saline matter by repeated washings; on the ground-level perforated stones set at the four corners of the basin admitted the rain-water, which was discharged from the roofs by lead pipes; this water filtered through the sand and percolated into the shaft of the well, whence it was drawn in copper buckets.
At other parts of the field the effect is the same, in accordance with the principle known as Babinet's, whether the imaginary screen in front of the object-glass is generally transparent but studded with a number of opaque circular disks, or is generally opaque but perforated with corresponding apertures.
If the eye, provided if necessary with a perforated plate in order to reduce the aperture, be situated inside the shadow at a place where the illumination is still sensible, and be focused upon the diffracting edge, the light which it receives will appear to come from the neighbourhood of the edge, and will present the effect of a silver lining.
Thus, to refer again to the acoustical analogue in which plane waves are incident upon a perforated rigid screen, the circumstances of the case are best represented by the first method of resolution, leading to symmetrical secondary waves, in which the normal motion is supposed to be zero over the unperforated parts.
In like manner our present law (20) would apply to the kind of obstruction that would be caused by an actual physical division of the elastic medium, extending over the whole of the area supposed to be occupied by the intercepting screen, but of course not extending to the parts supposed to be perforated.
E is a valve in the inlet pipe opening into the cylinder; and A the piston is perforated by one or more holes, each fitted with valves opening outwards on its upper surface.
He supposed a cylindrical vessel full of water to be perforated in its bottom with a small hole by which the water escaped, and the vessel to be supplied with water in such a manner that it always remained full at the same height.
Each cistern is fitted kith a perforated false bottom, on which a blanket or specially woven cloth is placed, to receive the char which is poured in from the top, and packed as evenly as possible until the cistern is filled.
It consists of a vertical column divided into a number of sections by horizontal plates, which are perforated so that the ascending vapours have to traverse a layer of liquid.
The thurible, the proper ecclesiastical term for the vessel in the Western Church, is usually spherical in form, though often square or polygonal, containing a small receptacle for the charcoal and covered by a perforated lid; it is carried and swung by three chains, a fourth being attached to the lid, thus allowing it to be raised at intervals for the volume of smoke to be increased.
The anterior maxillary teeth are grooved or "perforated."
The poison-fangs are "solenoglyphous," perforated, having a wide hole on the anterior side at the base, in connexion with the duct of the large, paired, poison-glands, the presence of which adds considerably to the characteristic broadness of the head.
It has been shown that this behaviour of dielectrics can be imitated by a mechanical model consisting of a series of perforated pistons placed in a tube of oil with spiral springs between each piston.
The " cradle " is a simple appliance for treating somewhat larger quantities, and consists essentially of a box, mounted on rockers, and provided with a perforated bottom of sheet iron in which the " pay dirt " is placed.
The upper end contains a perforated riddle plate which is placed directly over the riffle box, and under certain circumstances mercury may be placed behind the riffles.
The discharge of the comminuted material takes place through an aperture, which is covered by a thin steel plate perforated with numerous slits about Ath in.
In the Thies process, used in many districts in the United States, the vats are rotating barrels made, in the later forms, of iron lined with lead, and provided with a filter formed of a finely perforated leaden grating running from one end of the barrel to the other, and rigidly held in place by wooden frames.
It flows generally east by south through a tortuous valley as far as Miranda de Ebro, passing through the celebrated Roman bridge known as La Horadada ("the perforated"), near Ona in Burgos.
A 40 year old lady was transferred from another hospital following laparotomy for suspected perforated appendix.
The second sheet (not perforated) should be retained for your records.
The solar absorber is placed symmetrically at mid level in the solar collector and is abundantly perforated to allow upward air currents.
Formerly the pans were heated by open firing from below; but now the almost universal practice is to boil by steam injected from perforated pipes coiled within the pan, such injection favouring the uniform heating of the mass and causing an agitation favourable to the ultimate mixture and saponification of the materials.
As a source of light he used sunshine passing through a very small hole perforated in a metal plate, or condensed by a lens of short focus.