Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 649
is also shown by the collisionballs illustrated in Fig. 602. This well known experiment isadapted to the lantern, and shows well on the screen. Sixof the steel balls already referred to or six small glass ballsor marbles are required. Each ball is provided with a smallmetallic eye, which is… … &lA^MY Collision Balls. The sixth ball is suspended by a wire, which is bent downbetween the supports to receive a thread which extendsthrough an eye attached to the supports and serves to drawback the sixth ball. The thread by which the ball is movedis not noticeable, as it is partly or wholly…
Physics · Lantern projection · Electric apparatus and appliances
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