Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 620
very littletrouble. The production of cohesion figures on the screen is a sim-ple and interesting experiment. Between two glass platesof a width suitable for the lantern is placed a small amountof vaseline, either plain or colored with alkanine or aniline.The plates are pressed together until all… … Arrangement for Projecting Apparatus. point of a knife blade is introduced between the upper cor-ners of the glass plates. Upon the smallest separation of theplates, arborescent figures will appear on the screen, whichwill grow as the plates are further separated, appearing, asshown in Plate VIII.,…
Physics · Lantern projection · Electric apparatus and appliances
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