Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 609
mysterious. The application of electricity to magical operations isquite common, but it is capable of more extended and moreeffective uses. The few examples shown in the engravings are such asafford entertainment and give practice in the applicationsof electricitv. The mysterious drum, shown in… … Mysterious Drum. constructed in various forms. It is designed to beatby means invisible and undiscoverable without removingthe drum heads. The drum is suspended from what appearsto be an ordinary hook, and the operative parts are con-cealed so as to be invisible either through the translucentheads…
Physics · Lantern projection · Electric apparatus and appliances
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