The book Electricity And Magnetism, a Popular Introduction was written by author Selimo Romeo Bottone Here you can read free online of Electricity And Magnetism, a Popular Introduction book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Electricity And Magnetism, a Popular Introduction a good or bad book?
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On rotating the handle the little brushes sweep along the surfaces of the rotating glass and thereby set up a minute charge on the outer surfaces of the glass, and this acts in- ductively on the tinfoil sector which happens to be oppo- site to it on the other plate when it passes under the brush on the other side, and this in its turn induces electricity of opposite kind, on all the sectors on the opposite plate until it reaches the comb towards which it is travelling, when it gives up its char...ge to the comb, thereby becoming itself neutral and ready to undergo the same cycle of changes while passing under the influence of the lower brush. In the above sketch we have only followed one tinfoil sector, but it must be borne in mind that during one revolution, each tinfoil sector becomes induced, and in its turn in- 76 ELEOTBIGITY AND MAGNETISM. duces electricity on the sectors opposite, so that the cumu- lative effect in one revolution of the glass plates is very great, indeed, with plates having forty or more sectors the slightest rotation elicits a perfect torrent of elec- tricity.
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