Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 192
Thenthe speed is kept constant for a certain time—say half aminute—and the number of turns of the crank in this time iscounted and the rotations of the wheel deduced. Then onmultiplying this number by the number of teeth on the wheelwe can at once deduce the number of vibrations per second.The… … A perforated metal disc B rotates on a vertical axis, justabove a cylindrical air-chamber G. Theupper end of the chamber and also the discare perforated at equal intervals along acircle which has as centre the axis of rota-tion. The upper and lower holes correspondin number, position and size, but…
Physics
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