Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 430
Dr. Gassners Dry Battery. by weight; plaster, 3 parts, by weight ; chloride of zinc, ipart, b}^ weight; water, 2 parts, by weight. The oxide ofzinc in this composition loosens and makes it porous, and thegreater porosity thus obtained facilitates the interchange ofthe gases and diminishes the…
Physics · Lantern projection · Electric apparatus and appliances
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