Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 210
-nected with the electriccircuit. The wire in this coil iscorrugated, as shown inFig. 80, to prevent theenamel from being crackedby expansion and contrac-tion of the coil, in heatingand cooling; the differenceof expansion by heat, be-tween the enamel and thiswire, being too slight, inthese short… … Fig. 80. 188 ELECTRICITY FOE EVERYBODY. which are attached a number of spring-jacks, connectedwith the electric circuit; and by thrusting a plug intoone of these spring-jacks, through a hole in the board,
Electricity
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