Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 274
f a propeller POLARIZED LIGHT. 251 wheel or wind wheel. Each ray of the star is made of twoscalene triangles of mica oppositely arranged with respectto each other, and inclined in opposite directions, the longerand shorter sides of adjacent triangles being fastened at theperiphery of the star by a… … Star, Fan, and Crossed Bars of Mica. of the strips, the other having it at the end, giving theobject an appearance similar to that of a folding fan. Any of these objects may be viewed by means of theblack glass polarizer in connection with either of the formsof analyzer already described or in the…
Physics · Lantern projection · Electric apparatus and appliances
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