Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 353
case, the plate holder proper is made ofbrass and fitted to the camera box, from which it is neverremoved, except in case of some disarrangement of theinterior parts of the camera. The holder consists of a flatsheath, made of suitable size to readily admit the plate, andprovided with an opening in… … Interior of Pocket Camera. the sheath, and tend to press the plate forward to bring thefilm into the focal plane. The end of the sheath, which projects upward above thetop of the camera box, is of suitable size to be received inthe stiffened ends of the bags, and a channel is formedaround the end…
Physics · Lantern projection · Electric apparatus and appliances
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![An illustration from [Electric engineering.] (1902)](https://img.insideoutlibrary.com/img/200/ia-electricengineer03inte-324-199.webp)
