Electricity, Electrometer Magnetism, and Electrolysis

Electricity, Electrometer Magnetism, and Electrolysis

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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. 1894 edition. Excerpt: ...in a remarkably clear and able way. Any reader who desires to know what has been done in this department will do well to consult these papers. We quote the following as an example of Favre and Silbermann's results and of the calculations of Bosscha. The heat evolved in a cell of Smee' and in platinum wires of different lengths through which it was circuited was measured with the following result: --Local heat and residual electromotive force. Favre and Silver mann. UoSSCllM and it is found that on making R-323 and L = 7589, this formula will represent thu results of experiment very fairly. The last column in the above table gives tlio value of Q thus calculated. In general so good an agreement is not to bo expected, because L may and does vary with the strength of the current. Theories Thus far we have been dealing with the direct results of TM-i. f experiment, but when wo inquire into the reason for leciro-'ne exu, lenea f this residual electromotive force and of the moors local development of heat corresponding to it, and, in force. particular, when we ask why tho ofleet is so much greater with some metals than with others, the answers become less satisfactory. We meet, in fact, with considerable divergence of opinion. Joule's view was that the effect is due to tho affinity of the metal of tho electrode for oxygen. This is endorsed to a certain extent by Sir William Thomson, who puts tho matter thus:1--"la a pair consisting of zinc and tin the electromotive forco has been found by Poggcndorff to be only about half that of a pair consisting of zinc and copper, and consequently less than half that of a single cell of Smoe's. There is therefore an immense loss of mechanical effect in the external working of a battery composed of...show more

Product details

  • 12-17
  • Paperback | 208 pages
  • 189 x 246 x 11mm | 381g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236541316
  • 9781236541314