Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 286
a microscope with the addition of a polari-scope, which calls for an outlay of at least fifty dollars,besides the cost of the objects, and while it is believed that POLARIZED LIGHT. 263 such an outlay would be indirectly, if not directly, profit-able, it is not necessary to expend a fiftieth of… … Polanscope for Microscopic Objects. inches focus respectively, giving when combined a f inchfocus, 50 cents; eighteen elliptical microscope cover glassesfor analyzer, 38 cents. The cost of wood for the principalparts, the pasteboard tubes, the glass for the polarizer, andthe metal strips for the…
Physics · Lantern projection · Electric apparatus and appliances
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