Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 326
wer hole impinges against the sideof the hole in D and, issuing therefrom, reacts against D, both ac-tions tending to cause D to rotate about its axis. As D moves alittle the issuing air is cut off until the holes again come over eachother, when another impulse is given to D and another puff of… … D, evidently they will coincide with the holes in B 16 times dur-ing a single revolution, thus allowing 16 consecutive puffs of airto escape. The siren is so adjusted as to emit a sound identical inpitch with that to be determined, and then the counting deviceW. E. is thrown into action. The number…
Physics
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