Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 271
r. The size is im- 248 EXPERIMENTAL SCIENCE. material; the glass plate may be ij inches wide by 3 incheslong. This object exhibits fine bands of prismatic colorwhen viewed in the polariscope. Two such semi-cylinders,when crossed, exhibit the intricate figure shown in Fig. 260,with all the splendid… … Mica Semi-Cylinders Crossed. ened together by small tin clips inserted in holes in themica and bent downward on opposite sides. The clips arenot noticeable, and are efficient in holding the edges together.Cement will not answer the purpose, as it adheres to thesurface onl)^, and it must be…
Physics · Lantern projection · Electric apparatus and appliances
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