Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 186
. TREVELYAN ROCKER. This apparatus consists of a short piece, A, of lead pipe,about an inch in diameter, and a piece, B, of thick brasstubing, about | inch outside diameter and fi^e or six incheslong. The lead pipe is flattened a httle to keep it from roll-ing, and the surface along the side which… … Trevelyan Rocker. most is scraped and smoothed. The brass tubing, B, isfiled thin, upon one side, near one end, and the :ain partis driven in with the pein of a hammer or a punch so asto leave the longitudinal ridges, a a, as shown in the endview in Fig. 165. When the brass tube is heated and…
Physics · Lantern projection · Electric apparatus and appliances
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