Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 191
hissingnoise will cause it to roar and become non-luminous. Anydegree of sensitiveness may be attained by careful adjust- … 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.
Physics · Lantern projection · Electric apparatus and appliances
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