Philosophical Transactions of the Royal Society of London Volume 147, PT. 1

Philosophical Transactions of the Royal Society of London Volume 147, PT. 1

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1857 edition. Excerpt: ...of the muscular current cannot be verified. On the other hand, I was thus impelled to redouble my efforts to arrive at a clear idea of the phenomena of induced contraction, and I feel satisfied in being now enabled to say that I have at length succeeded in attaining my object. I shall be as concise as possible in describing' the three principal experiments on which my last conclusions are founded. It is not necessary that the galvanometer employed in these experiments should be the most delicate, 'that is, of 24,000 coils, an ordinary one of 1500 or 2000 coils being sufficient for the purpose. The metallic plates with which the circuit is closed should be of zinc, perfectly well amalgamated, that is, recently immersed in diluted sulphuric acid, then in pure mercury, and afterwards washed repeatedly in water. The two plates thus prepared, plunge in a saturated and neutralized solution of sulphate of zinc contained, as before described, in two small glasses, provided with strips or cushions of paper or flannel which imbibe the liquid in the manner adopted by M. DU Bols REYMOND. If these cushions are left for a certain time in contact, the needle rests at 0, and no sign of current is visible on reopening and closing the circuit again. " On Animal Electricity," Abstract of the Discoveries of EM11. DU Bors Rsruorm; edited by Dr. Barron J orrss, p. 132. ' 1' Untersuchungen iiber thierische Electricitit. 1 " On Animal Electricity," Abstract of the Discoveries of Emu. Du Bors Rsrnoma; edited by Dr. Brawn Jorms, p. 134. Philosophical Transactions, 1850. MDCCCLVII. U Exp. 1. I lay on the quadrant of the galvanometer, exactly in contact with the end of the needle in its state of equilibrium, a solid body, which...show more

Product details

  • Paperback | 114 pages
  • 189 x 246 x 6mm | 218g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 1236933788
  • 9781236933782