76 examples of perforations in sentences

With this, when the business fit was on him, he counted the lines and dots upon a stamp, the perforations on its edge.

"They did not appear to be bones such as may be bought at an osteological dealer's, for these usually have perforations to admit the macerating fluid to the marrow cavities.

The pressure is enormous, and all the water remaining in the mall is pressed through the cloth and perforations in the press-box till nothing but the pure indigo remains behind.

A.The collective area should be at least equal to the area of the pump piston, and the lower edges of the perforations should be rounded off to afford more free ingress or egress to the water.

The inlet and outlet valves of the air pump consist of brass plates 1/2 inch with strong feathers across them, and in each plate there are six grated perforations covered by india rubber discs 7 inches in diameter.

These six perforations afford collectively an area for the passage of the water equal to the area of the pump.

The crank pin is perforated through the centre by a small hole about 3/4 of an inch in diameter, and three perforations proceed from this central hole to the surface of the pin.

Each crank shaft bearing is similarly perforated, and pipes are cast in the discs connecting these perforations together.

The fact alluded to is, that there is attached to the upper mandible of all young birds about to be hatched a horny appendage, by which they are enabled more effectually to make perforations in the shell, and contribute to their own liberation.

The long, flexible film is perforated along both edges, and these perforations fit over toothed wheels which guide it down to the lens; the holes in the celluloid strip are also used by the feeding mechanism.

In order that the interval between the pictures shall always be the same, the film must be held firmly in each position in turn; the perforations and toothed mechanism accomplish this perfectly.

The five-inch roll of paper, perforated by the keyboard machine (a hole for every letter), gives the signal by means of compressed air to the mechanism that puts the matrix (or type mould) in position and casts the type letter by letter, each character following the proper sequence as marked by the perforations of the paper ribbon.

This information is marked by perforations on the paper ribbon by the pressure of two keys, and when the ribbon is transferred to the casting machine these space perforations so govern the casting that the line of type delivered at the "galley" complete shall be of exactly the proper length, and the spaces between the words be equal to the infinitesimal fraction of an inch.

This information is marked by perforations on the paper ribbon by the pressure of two keys, and when the ribbon is transferred to the casting machine these space perforations so govern the casting that the line of type delivered at the "galley" complete shall be of exactly the proper length, and the spaces between the words be equal to the infinitesimal fraction of an inch.

[Illustration: WHERE THE "BRAINS" ARE LOCATED The perforations in the paper ribbon (shown in the upper left-hand part of the picture) govern the action of the machine so that the proper characters are cast in the proper order, and also the spaces between the words.]

In it have been found, besides these skeletons, stone axes and knives, and several ornaments, with holes through them, by means of which, with a cord passing through these perforations, they could be worn by their owners.

On the breast also lay a stone ornament with two perforations, one near each end, through which passed a string, by means of which it was suspended around the wearer's neck.

Stepping lightly to one of the little perforations which had once served as windows to the tower, he cautiously thrust his head through the opening; and, after gazing there half a minute, he withdrew it again, making a gesture to the attentive Wilder to be silent.

The surface is a mass of intricate pattern work and perforations.

It should then be put upon the salting board (a smooth wooden board), placed in a slanting position, or upon a board with numerous perforations, in order to allow the blood to freely flow down.

The transmitter as a rule consists of a mechanically or motor driven mechanism which causes the telegraph impulses to be transmitted to the line, and the combination and character of the impulses are determined by the tape perforations.

The walls and roof showed many perforations.

Two small perforations on each side immediately above the mouth, protected by a convex transparent hood, which has a rounded opening on its under surface.

This species differs from the above in being much larger, and in wanting the two perforations on each side above the mouthin the less comparative size of the opening of the cell, and in the remarkable elevation of the sharp margin surrounding the upper half of the cell.

In C. pumicosa this organ presents several rather large circular spots or perforations ?

76 examples of  perforations  in sentences