Atkinson, Philip. [from old catalog] · New York, The Century co. · leaf 211
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, … Fie. 81. any utensil can be connected with the circuit. by itssocket, through a flexible conductor attached to this plug,as shown. HEAT AND ELECTRICITY. 189
Electricity
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