Trebel, George. [from old catalog] · New York, F. Tousey · leaf 43
net and armature being in con-tact with one another, i. e., N with S, theyserve to bind one anothers magnetism. Thin bars of steel can be more thor-oughly magnetized than thick ones.Hence, if several thin bars (Fig. 1) arelaid side by side, with their correspond-ing poles turned In the same… … USE ELECTRICITY. 37 tube makes very nearly as strong a magnet as a rod of the samediameter, and is much lighter than the latter. Perpetual motion seekers are easily led into the erroi of sup-posing that in the magnet they have an inexhaustible supply ofenergy; but a very little study will serve to…
Electricity
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