Descripción
4to (278 x 210 mm). xxvi, 80 pp. and 3 folding engraved plates (plate III in first state with the letter 'E' in fig. 22 uncorrected); woodcut headpieces; bound without intermediate blank leaf C6 as usual. Contemporary Italian cardboard, pasted over with orange metallic paper, red-sprinkled boards, original endpapers (some paste-paper chipping to extremities and spine). Title-leaf with erased circular stamp (resulting in some paper-thinning outside printed area); crisp and bright throughout with just some minor occasional spotting of text and plates; small hole in blank fore-marging of plate I. Provenance: from an Italian private collection. This copy comes with an official export permit issued by Italian government. A near fine, wide-margined copy. ---- RARE FIRST EDITION IN BOOK FORM. Galvani first published his theory in 1791 in volume V of the proceedings of the Bologna Academy of Science. He believed that "animals possess in their nerves and muscles a subtle fluid quite analogous to ordinary electricity" (DSB). The offprint of his 1791 article, the first separate edition of the work, is known in only a dozen copies. Galvani's nephew, Aldini, became his uncle's most ardent supporter, and published this edition - the first in book form - the following year with his extended notes and commentary. At the end appears an exchange of letters between Don Bassano Carminati and Galvani, containing Carminati's report of Volta's repetition of Galvani's experiments, which Volta interpreted correctly as the result of contact electricity. "By the end of the eighteenth century the connexion between nervous action and electricity had been the subject of investigation for some time. Newton, when discussing the properties of aether, had made suggestions that an electric spirit might convey sensations to the brain along the nerves and produce muscular reactions: see Book m of Opticks and the General Scholium concluding the second edition of the Principia. Haller also made experiments trying to prove a connexion between electrical action and reflexes of the muscles. It was left to Luigi Galvani, professor of anatomy at Bologna, in 'On the Effects of Electricity on Muscular Motion?, to provide, as he thought, dramatic experi¬ments on what was called 'animal electricity' and after¬wards 'galvanism'. Galvani observed in his laboratory that when a nerve in a frog's leg was touched with a scalpel, violent contractions of the muscles occurred simultaneous with the sparks discharged from a nearby electrical machine. He further discovered that when one metal was placed in contact with a frog's nerve, another with a muscle, and the metals touched, contraction of the muscle took place, without needing a spark from an electrical machine. As a physiologist, Galvani thought that this action was due to the presence of electricity in the animal itself, as in the 'electric eel', and that the metal wires simply served as conductors. He did not realize that he had not discovered just a new physiological source of electricity, but a new source of continuous electric flow in chemical action. Hitherto electricity had been produced only in high-voltage, intermittent surges from frictional machines. It was Alessandro Volta, a physicist, who proved that animals were inessential to 'galvanic' electricity, and who constructed the first battery to cause a current to flow by chemical action. Galvani's paper immediately aroused great interest in the scientific world, and it involved him in controversy with Volta (largely carried on by Galvani's nephew, Giovanni Aldini, on his uncle's behalf). Galvani's influence on the modem development of energy, electrochemistry and electromagnetism is an indirect one. But there is no doubt that modern electro¬physiology, as was emphasized by one of its foremost representatives, Du Bois-Reymond in Germany, derives from those observations of the behaviour of the frog's legs" (PMM 240). "In his experiments on the irritab. N° de ref. del artículo 003732
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