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Encyclopedia Britannica



GALVANI, LUIGI (1737-1798)

This article appears in Volume V11, Page 428 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: GAG-GEO
GALVANI, LUIGI (1737-1798) , Italian physiologist, after whom galvanism received its name, was born at Bologna on the 9th of September 1737. It was his wish in early life to enter the hurch, but by his parents he was educated for a medical career. At the university of Bologna, in which city he practised, he was in 1762 appointed public lecturer in anatomy, and soon gained repute as a skilled though not eloquent teacher, and, chiefly from his researches on the organs of hearing and genito-urinary
tract
  of birds, as a comparative anatomist. His celebrated theory of animal electricity he enunciated in a treatise, " De viribus electricitatis in motu musculari commentarius;" published in the 7th volume of the memoirs of the Institute of Sciences at Bologna in 1791, and separately at Modena in the following year, and elsewhere subsequently. The statement has frequently been repeated that, in 1786,
Galvani
  had noticed that the leg of a skinned frog, on being accidentally touched by a scalpel which had lain near an electrical
machine
 , was thrown into violent convulsions; and that it was thus that his attention was first directed to the relations of animal functions to electricity. Fromdocuments in the possession of the Institute of Bologna, however, it appears that twenty- years previous to the publication of his Commentary
Galvani
  was already engaged in investigations as to the action of electricity upon the muscles of frogs. The observation that the suspension of. certain of these animals on an iron railing by copper hooks caused twitching in the muscles of their legs led him to the invention of his metallic arc, the first experiment with which is described in the third part of the Commentary, with the date September 20, 1786. The arc he constructed of two different metals; which, placed in contact the one with a frog's
nerve
  and the other with a muscle, caused contraction of the latter. In Galvani's view the motions of the muscle were the result of the
union
 , by means of the metallic arc, of its exterior or negative electrical charge with positive electricity which proceeded along the
nerve
  from its inner substance. Volta, on the other hand, attributed them solely to the effect of electricity having its source in the junction of the two dissimilar metals of the arc, and regarded the nerve and muscle simply as conductors. On Galvani's refusal, from religious scruples, to take the oath of allegiance to the Cisalpine republic in 1797, he was removed from his professorship. Deprived thus of the means of livelihood, he retired to the
house
  of his brother Giacomo; where he soon fell into a feverish decline. The republican government, in consideration of his
great
  scientific fame, eventually, but too
late
 , determined to reinstate him in his chair, and he died at Bologna on the 4th of December 1798.
A quarto edition of his works was published at Bologna in 1841-1842, by the
Academy
  of Sciences of the Institute of that city, under the title Opere edite ed inedite del professore Luigi Galvani.


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