Report of the Board of Regents Volume 1872

Report of the Board of Regents Volume 1872

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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. 1871 edition. Excerpt: ...deviation prescribed by the ascending current of the wire. In this case, also, I have every reason to believe, though I will not absolutely affirm it, that no voltaic current was introduced at such moments into the circuit so as to produce the oscillations in question. The experiments made in November, 1800, were conducted under better conditions when the correspondence between Courmayeur and Aosta had been suspended for two mouths. In these I was assisted by Siguor Eccher, adjunct of the chair of physics in this museum, to whose zeal and love for science it is due that even under unfavorable circumstances of weather and place, especially in the winter, all possible precautious were used in order that the experiments might yield exact results. At eaeh extremity of the line three similar vases of earth were sunk rn a formation of nearly identical qualities at a certain distance from one another, and the current was measured by transferring iu succession the electrodes of zinc immersed in porcelain cylinders and ascertained to be homogeneous, now to one and now to another of the earthen vases, all of which, at either extremity, were filled with water from the same source. The experiments between Aosta and Courmayeur were made on the 3d of November, 1806, at 8 o'clock in the morning; the atmospheric electricity at Courmayeur was feebly positive; snow had fallen in the night on elevated places, and the clouds were dissipated only at the rising of the sun. At 8.45, the line was tested iu order to ascertain its insulation, which was found to be perfect. The experiments yielded the following results: It is proper to add that at the two stations of Aosta and Courmayeur, two electrodes of copper were also in operation, consisting of two plates of that...show more

Product details

  • Paperback | 226 pages
  • 189 x 246 x 12mm | 413g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236532562
  • 9781236532565