Congressional Edition Volume 2121

Congressional Edition Volume 2121

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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. 1883 edition. Excerpt: ...to the north of us, were more or less highly electrified--positively or negatively. as the case may be--we will suppose positively; if the electric tension were sufficient, we might, since dense air is a non-conductor, have a discharge taking place in the higher regions of the atmosphere where the air is rarefied, and accordingly opposes less resistance to the change. "In the figure the great circle P E p e is supposed to represent a section of the earth by a plane passing through its center. This faint shading outside represents the atmosphere, the height of course being enormously exaggerated. Meridian section of the Earth. "Suppose in some way or other a portion of the upper atmosphere, as 0, got considerably charged positively or negatively, say positively, it would act by induction on the earth below. The opposite, electricity, negative in that case, would be accumulated underneath, as at c, and this portion of tbe eartb would form, as it were, a portion of a Leydeu jar, the lower atmosphere being the dielectric or glass of the jar, the upper atmosphere being partly the dielectric and partly also the charged coating. It would be represented more precisely by an imaginary coating outside, composed not of tin-foil but of some badly conducting substance. The positive electricity about 0 would be bound down in part by the negative electricity about c, which it induces. In another portion of the atmosphere--it may be at some considerable distance from the former--yon may have the atmosphere charged in an opposite way; and of course if this were negative there would be induced positive electricity below, or it might be that the whole of the atmosphere from C to D is charged positively, but at D the negative charge is much feebler than at...show more

Product details

  • Paperback | 402 pages
  • 189 x 246 x 21mm | 717g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236503325
  • 9781236503329