Easy electrical experiments and how to make them; (1918)
Dickinson, Leonard Perley, 1874- [from old catalog] · Chicago, F. J. Drake & co · leaf 139
iameter as the outertube and % inch thick. Cut away its lower portion, so that itwill fit snugly into the outer tube. Through its center bore ahole J4 inches in diameter, so that the smaller lead tube willjust fit into it snugly. Solder to the upper end of this tube twolead strips, one of which is… … EASY ELECTRICAL EXPERIMENTS. 125 the latter will be held firmly in the block. Now immerse thewooden block after the smaller tube is in place, in smoking*hot paraffine wax, leaving it there until the wood has becomethoroughly saturated with the hot wax. This is to protect thewood from the action of…
Electric apparatus and appliances · Electricity
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