Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 663
urrent is turned on, the carbons are brought into 640 EXPERIMENTAL SCIENCE. contact and separated, forming the arcbecome incandescent, and the arc the light in full seen on a large scale on the screen. These experiments are very striking whenlarge screen, the projection of the arc and incandbeing… … Rocking Prism adapted to the Lantern. ing prism shown in Fig. 218 is adapted for use in connectionwith a lantern. The light emerging from the lantern must passthrough a narrow slit to secure a perfect spectrum, and be-tween the screen and the prism should be placed a screenAvith an oblong aperture,…
Physics · Lantern projection · Electric apparatus and appliances
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