Magnetism and an electricity. Luigi Galvani

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At that time already knew about such phenomenon, as reduction of muscles under the influence of an electricity. In this problem the Italian doctor Luigi Galvani (1737-1798) also was engaged, undertaking attempts to cause reduction of pads of a frog by means of an atmospheric electricity. In November, 1786 it has made the opening which has immortalised his name. In the treatise ' About forces of an electricity at muscular movement ', published in Latin language in 1791г., Galvani wrote: ' Expecting in vain muscle reduction in the clear serene day exhausted with vain expectation, I have begun the copper hooks thrust in a spinal cord of a frog, to concern iron ё=хЁцэ ... ' It has appeared that pads of a frog have shuddered despite serene day.

(At first this phenomenon of Galvani connected with changes of an electric condition of atmosphere.) amazed with it, Galvani has placed the prepared frog in the closed premise, repeating the same experiment. ' If to suspend a frog so, - he, - that wrote a hook passing through a spinal cord, adjoined to a silver plate, and then to take a frog for one pad so that its other pad could adjoin freely to a plate, when this pad adjoins to a silver plate, muscles immediately start to be reduced. The pad is reduced and rises, falls and, having concerned a plate, again rises upwards. Thus, to considerable amazement and pleasure of the observer, the pad serially rises and falls, say, behaves so as if competes to any certain electric pendulum '.

Galvani has been convinced that an electricity source was the nerve of a frog that has opened ' animal ' an electricity. He has come to conclusion that deals with the phenomenon of electric categories in the live organism, similar to categories in lejdenskoj bank.