Elements of Galvanism, in Theory and Practice; With a Comprehensive View of Its History, from the First Experiments of Galvani to the Present Time. Co - Brossura
Sinossi
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. 1804 edition. Excerpt: ... chap. xii. Experiments made by Professor Aldini on coldblooded animals--He endeavours to combat the doEtrine O/"volta, apparently with li-le success--He is the first to excite convulsions in coldblooded animals, by the influence of warmblooded animals without the intervention of any metallic substance. repeated mention has been made in this work, of Professor Aldini, nephew to the celebrated Galvani. The following is a brief account of several of his most interesting experiments. About the middle of October of the last year, (1802) this naturalist made several experiments in presence of the Galvanic Society of Paris. It will suffice to recapitulate the principal phenomena which were observed. 1st, Several frogs, which had been recently prepared, successively exhibited the phenomenon of a very sensible contraction, without any metallic substance being interposed, and by the simple contact of the nerves with the muscles. 2dly, The animal arc was several times produced, and made sensible, by similar disposic c 2 tions tions to those detailed in the preceding experiment. 3dly, Simultaneous muscular contractions were produced by the application of silver alone, in three frogs recently prepared, and placed, in the same direction, at the side of each other. The experimenter being, however, desirous to prove that the fluid by which the animals were acted on, was not ascribable to metallic electricity, changed the position of the intermediate frog, by placing the superior extremity of its trunk in a parallel line to the inferior extremities of the Other frogs. A contraction being observed to ensue in the latter, without any such contraction being noticed in the intermediate frog, it was necessarily concluded that, as the fluid did not take the...
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