Experimental science. Elementary, practical and experimental physics (1890)
Hopkins, George M. (George Milton), 1842-1902 · New York, Munn & co. · leaf 409
^ be cast directly uponthe wires by using an old-fashioned bullet mould with a hole Fig. 3S2. … Universal Discharger. drilled in the bottom to receive the wire upon which theball is cast. Type metal is excellent for this purpose, butlead will answer very well. An alloy of tin and antimonymakes a very fine ball, having the appearance of silver.In a certain class of experiments the universal…
Physics · Lantern projection · Electric apparatus and appliances
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