Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 148
ersationmay be carried on over quitea long distance, b) talking inone instrument and listeningat the other. The vibrationof one diaphragm, due to theimpact of sound waves, istransmitted to the other dia-phragm by the thread. String Telephone. In the toys illustrated we have a representative of… … 126 EXPERIMENTAL SCIENCE. HARMONIC VIBRATIONS. Impulses which, occurring singly or at irregular inter-vals, are incapable of producing any noticeable effects may,when made regularly, under favorable circumstances, yieldastonishing results. The rattling of church windows by airwaves generated by a…
Physics · Lantern projection · Electric apparatus and appliances
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