Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 160
ence by such means. Among ph^sical experiments, none are more attractiveor instriictive than those connected with the subject ofsound. The experiments of M. Lissajous are particularlyinteresting, but when the figures are produced by the appa-ratus employed by Lissajous, a costly set of instruments… … more costl}-, and, at the same time, more efficient in its per-formance. The device shown in Fig. 145 consists essentiallyof two plane mirrors, supported by torsional bands of rub-ber, one being supported so as to vibrate in a vertical 138 EXPERIMENTAL SCIENCE. plane, the other in a horizontal…
Physics · Lantern projection · Electric apparatus and appliances
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