Meadowcroft, Wm. H. (William Henry), b. 1853 · New York & London, Harper & brothers · leaf 74
city which makes theselamps give us light. You will remember that in the chapteron Magnetism we ex-plained to you howelectricity makes mag-netism, and now wewill explain how, in thedynamo, magnetismmakes electricity. It has been foundthat the influence of amagnet is very strongat its poles, and… … A-B-C OF ELECTRICITY of force are only imaginary and cannot beseen in any magnet, but they are alwayspresent. The meaning of this term lines offorce, then, is used to designate the strengthof the magnet. Many years ago the great scientist Fara-day made the discovery that, by passing aclosed loop of…
Electricity
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![An illustration from Io. Bap. Portae Neopolitani de distillatione lib. IX : quibus certa methodo, multipliciq[ue] artificio, penitioribus naturae arcanis detectis, cuius libet mixti in propria elementa resolutio, perfectè docetur (1608)](https://img.insideoutlibrary.com/img/200/ia-iobapportaeneopo00port-146-145.webp)
