Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 284
Tourmaline Tongs. POLARIZED LIGHT. 261 … 262 EXPERIMENTAL SCIENCE. example, be placed between the tourmalines arranged in thisway, the light will again pass, showing that it has beendepolarized by the rock crystal. This has been accepted as an infallible test of the genu-ineness of quartz lenses. In the hands of an expert it isundoubtedly…
Physics · Lantern projection · Electric apparatus and appliances
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