Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 192
Sensitive Flame with Gas atOrdinary Pressure. SOUND. i6g ment of the gas supply. A quiet room is required for thisexperiment. The rustle of clothes, the ticking of a clock, awhisper, a snap of the finger, the dropping of a pencil, or in Fig. 172. Fig. 173. … Determining Speed by Resonance. Siren for Measuring Velocities. fact almost an} noise, will cause it to drop, become non-luminous, and roar. It dances perfect time to a tune whistledstaccato and not too rapidly. The flame at its base presents a large surface to the air. I/O EXPERIMENTAL SCIENCE. SO…
Physics · Lantern projection · Electric apparatus and appliances
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