Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 86
^^=j^^7ruA.nn The colored liquid squares are retained in the meshes otthe wire cloth by capillarity. A damp sponge will removethe color, so that the experiment may be repeated as often Fig. 56.
Physics · Lantern projection · Electric apparatus and appliances
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