The authenticity, however, of theperforations appears to be doubtful.
When this has perfectly dried, very small perforations are made under the belly with the point of a needle, and the sand allowed to escape, leaving the body in its natural form.
The volutes (to the right) are deeply cut and for about one-third their length penetrate the shell, producing four crescent-shaped perforations which show on the opposite side.
Spindle-whorl of dark clay with perforations and incised ornaments.
The design is engraved on the convex side, the perforations are placed near the margin, and show much wear by the cord of suspension.
Two medium-sized perforations for suspension have been made near the inner margin of one of the bosses next the dotted zone; these show abrasion by the cord of suspension.
The cross in the center of the concave face of the disk is quite simple and is made by four triangular perforations which separate the arms.
The long curved lines indicate the laminations of the shell, and the three crescent-shaped figures near the center are perforations resulting from the deep engraving of the three lines of the volute on the concave side.
Two coarser perforations are seen in section, and one lying among the smaller.
Normally the water-levels are at l, and the liquid has access to the carbide through perforations in the basket.
The gas then passes through perforations into the central spindle, one end of which is connected by a packed joint with a fixed pipe, which leads to a seal or washer containing petroleum.
The charge of carbide is thus plunged at once into the large body of water in the tank, and the gas evolved passes through perforations in the washer G to the condenser H and thence to the storage gasholder J.
In this chamber is a pipe perforated at about the water-level, so that when the level is lowered through the increased pressure thrown by the rising gasholder the water is below the perforationsand cannot enter the pipe.
When searching for nectar they quite commonly use the perforations of other insects.
Faxon, show a few characteristic perforations and mutilations, and also represent two of the principal kinds of insects which make them.
The general beauty of flowers is usually not greatly marred by the perforations except in a few cases, as when the spurs of columbines and corollas of trumpet creepers are much torn, which frequently happens.
The humble bees have short, stout, blunt jaws, ill adapted for cutting, and the perforations made by them are apparently always irregular in shape, and have jagged edges.
The great object of the perforations by insects is the obtaining of the concealed nectar in an easy way.
Bouteille, the perforations had been produced by other species.
The insect which had produced the perforations observed in the balls sent to the Crimea in 1857, and which M.
Behind the ears a groove and two perforations are worked in the mane, and above the ears two other perforations for the attachment of trappings of metal.
The helmet has a pointed visor and beavor in one piece, with perforations on each side.
Lukis discovered a remarkable oval armlet of jet ornamented on its outer surface, and with countersunk perforations in several places.
At each end are three small countersunk perforationsin a line with each other.
In both there are two V-shaped perforations close together, and formed in the body of the ring by drilling two converging holes.
Another object in stone, not unfrequently found in graves, and of which the use is now comparatively certain, is a rectangular plate usually round on one face, and hollow on the other, with perforations at either end.
The perforations may be natural, though improved by art.
The rings of jet with perforations at the edges, such as have been before mentioned as found in connection with buttons or studs, are sometimes found without them.
Some early Spanish[2051] whetstones have one and even two perforations at each end.
In the Museum at Copenhagen are one or two axes of flint, ground at the edge, but with the shaft-holes formed by natural perforations of the stone.
This can be effected in several ways, but the most perfect is to obtain as direct a communication as possible; a widening of the perforations of the breech, and space to allow the powder free access up the nipple.
The front target was intended to exhibit the perforations of the shell before bursting, and the back one to show the effect of the fragments resulting from explosion.
Sometimes it settles upon living shells and greatly irritates the animal, which constantly secretes new lime to cover the perforations in its shell.
The perforations in the lamina are produced by conical hollow papillae which cover the young frond and which at length burst, leaving a hole which enlarges as the plant expands.
Really, to beat the perforations is so easy that it will make you smile.
See, even in my haste and without glue, they fill the perforations completely and I can shake and pull the check without disturbing them.
These perforations are conical in form with the apex of the cone outward.
As before stated, the form of perforationsin the plates of a column through which the vapor pass upward through the beer or wash is particularly important.
In addition these perforations gradually enlarge by the action of acids in the wash or clog up, and the apparatus soon works badly.
The clogging and eventual stoppage of the perforations prevent the agitation of the mash carried on the plate, and a layer of mash accumulates and bakes on the head, or plate, above.
The perforations in the upper vase corresponded exactly to those in the lower when they were discovered, suggesting that they had been connected by cords of henequen fiber, ti-ti, or some perishable material which had disintegrated.
After using the patterns for paint stamping they should be washed thoroughly with naphtha until the perforationsare all perfectly clear.
Dove and Helmholtz introduced many improvements, and Brown of New York patented, about 1870, a steam siren with two disks having radial perforations or slots.
The perforations being cut at an angle, the disk was self-rotated by the oblique pressure of the air in escaping through the slots.
These smaller pipes contain a number of small perforations on their upper part, through which the air ascends into the water in innumerable small bubbles.
The top of the tube, i, is provided with four small projections, upon which rests a copper cone, o, soldered to the tube at a point below the perforations in the base of the thimble.
The anchor is of box-shape or cylindrical form, with perforations in it.
Long messages are copied off on a machine something like a type-writer, which, however, does not make type impressions, but cuts perforations in a long sheet of paper.
Again, artificially prepared perforations are used, through which the fillets are passed.
In open work nothing was needed but the end of the fillet or part inserted; again, in close work, perforations were made as in leather work, and the threads were inserted as are the waxed ends of the shoemaker.
The size of the perforations made varies ad infinitum.
The cranial perforations so much like one another reported from districts so remote and different in character, cannot be accidental.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "perforations" in a variety of sentences. We hope that you will now be able to make sentences using this word.
