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Upon examination it was found that the point of the needle had worn away considerably, becoming in fact, almost a chisel point.

To set it, take the upright in the left hand, chisel point up, pick up B with the right hand, place it with its notch fitting on the top of A, and keeping the slanting stick pressed down firmly, you hold the two in proper position.

Swing the handle still farther from the cylinder and cut a half V. This will give clearance for the chisel point and will prevent burning.

And if the broad side of the chisel point 276is used when a dark mass is wanted, the edge can constantly be kept sharp.

By using a crowbar with a tempered chisel point, the Mexicans easily channeled the rock into blocks, eighteen by thirty inches, splitting each stone a foot in thickness, so that when hauled to the place of use, each piece was ready to lay up in the wall.