Electricity for everybody; its nature and uses explained (1895)
Atkinson, Philip · New York, The Century Co. · leaf 121
s and motors, sometimes weigh-ing several tons. Solenoids.—A coil of wire through which an electriccurrent is flowing shows magnetic properties similar tothose of an electromagnet, but much weaker than thoseof a similar coil having a soft iron core. Such a coil, ifsuspended so as to have a free… … Fig. 46. having similar polarity, like a magnetic needle. Coilsmade to illustrate this principle are usually shapedlike a tube, as shown inFig. 46, and are thereforecalled solenoids, the wordsolenoid meaning tube-like. The reason why themagnetism of an electro-magnet is so muchstronger than that of…
Electricity
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