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Associated with this weevil we have found the smaller, rounder, more cylindrical, whitish grubs of the Hylurgus terebrans, which mines the inner layers of the bark, slightly grooving the sap-wood. Later in April it pupates, and its habits accord in general with those of Pissodes strobi.
Not only does the glacier collect a variety of foreign materials on its upper surface, but its sides as well as its lower surface are studded with boulders, stones, pebbles, sand, coarse and fine gravel, so that it forms in reality a gigantic rasp, with sides hundreds of feet deep, and a surface thousands of feet wide and many miles in length, grinding over the bottom and along the walls between which it moves, polishing, grooving, and scratching them as it passes onward.
A thick piece of cork should, therefore, be placed between the cramp and the hollow grooving or shell, a small block of moderately hard wood being placed inside the peg-box as an opposing pad or buffer, the cramp may then be screwed down fairly tight. The two operations, glueing and pressing the side parts and that in connection with the shell, must not be attempted simultaneously.
After your brother left you, you leaned your head against the pillar, and then, as if the grooving hurt your face, you put your hand between; and then I must apologize for my apparent impoliteness, but I promised to tell the truth;" and he smiled a little "then you seemed to fall fast asleep. A mosquito lit on your nose, and woke you.
"Yes," replied Harry, "and five to one the seam, which, however neatly it is drawn, must leave a slight ridge, will cross the direction of the grooving, and give the ball a counter movement; either destroying altogether the rotatory motion communicated by the rifling, or causing it to take a direction quite out of the true line; accordingly as the counteraction is conveyed near the breech, or near the muzzle of the piece."
No missile that has two points of bearing can be used with the gaining twist, as the change in the direction of the ridges on the shot formed by the grooves will necessarily tend to change the position of the axis of the shot; and the gaining twist is the greatest improvement made since grooving was successfully applied; to reject it is to reject something indispensable to the best performance of the rifle.
By putting this weight of ball into a conical form of good proportions, the calibre of the gun may be made about ninety gauge. which, for a range of four hundred yards, cannot be excelled in accuracy with that weight of gun. But in a rifle the grooving is of the utmost importance; for velocity without accuracy is useless.
Thus dusting, which seems at first to consist of simply a few brushes with a cloth or bunch of feathers, when analyzed once, is found to imply the careful wiping of every article in the room, and of all the woodwork; analyzed again, it implies following the marks of the cabinet-maker's tools in every bit of carving and grooving; analyzed again, introducing a pointed stick under the cloth in turning corners.
Other some are following hard after, and are throwing the Bible into the furnace, are melting it into iron, and forging it, and welding it, and twisting it, and grooving it into the shape and significance and goodness and gospel of Sharpe's rifles. Sir, are you not afraid that some of your once best men will soon have no better Bible than that?
How many centuries of cutting and gouging, beveling and grooving were required to accomplish this, who can tell? Never resting, never halting, ever moving, irresistibly cutting, carving, grinding and demolishing, it carried away its millions of millions of tons of rocky débris in bowlders, pebbles, sand and mud, and thus helped make the gigantic moraines of Fallen Leaf Lake.
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