The Industries of the World, a Course of Technical Education, Ed. by J. Wylde

The Industries of the World, a Course of Technical Education, Ed. by J. Wylde

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 edition. Excerpt: ... instant 43. y placing another needle near a plate of glass, be obtained the following results: --... from 90 to 41.. 122 oscillations.... from 90 to 41.. 180 ... from 90 to 41.. 208 ... from 90 to 41.. 221 ates of metal afforded M Arago similar; but he, nevertheless, observed that netals which act with more energy than wood, &c, have a mode of action different hat of these substances. From all these, it is manifest that all bodies, when placed L. II. near a magnetic needle in a state of oscillation, exercise over it an action, the effect of which is to diminish the amplitude of its oscillations, without altering their number; and hence the doctrine of the universal prevalence of magnetism in all bodies derives a new confirmation. "When Seebeck, of Berlin, heard of the discovery of Arago, he made a magnetic needle, 2ith inches long, oscillate at a distance of three lines above plates of various bodies, and counted the number of oscillations which were required in each case to reduce the amplitude from 45 to 10. They were as follow: --"By alloying magnetic with non-magnetio substances, compounds were formed that had no action on the magnetic needle. The alloys which had particularly this singular property were those consisting of four parts of antimony and one of iron, or two parts of copper and one of nickel. In these cases the magnetism of the two ingredients must have been neutralised by their opposite actions." The preceding facts and experiments will have shown, to a certain extent, that all bodies are susceptible of magnetic influence; but the subject will be still further generalised when we treat on dia-magnetism as developed by the experiments of Faraday and other philosophers. From what has more

Product details

  • Paperback | 598 pages
  • 189 x 246 x 31mm | 1,052g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236645944
  • 9781236645944