Experimental Researches in Electricity

Experimental Researches in Electricity
Volume 1

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Experimental Researches in Electricity by Michael Faraday

Published:

1838

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Experimental Researches in Electricity
Volume 1

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Reprinted from the PHILOSOPHICAL TRANSACTIONS of 1831-1838.

Book Excerpt

he galvanometer.

9. In these and many similar experiments no difference in action of any kind appeared between iron and other metals.

10. Two hundred and three feet of copper wire in one length were coiled round a large block of wood; other two hundred and three feet of similar wire were interposed as a spiral between the turns of the first coil, and metallic contact everywhere prevented by twine. One of these helices was connected with a galvanometer, and the other with a battery of one hundred pairs of plates four inches square, with double coppers, and well charged. When the contact was made, there was a sudden and very slight effect at the galvanometer, and there was also a similar slight effect when the contact with the battery was broken. But whilst the voltaic current was continuing to pass through the one helix, no galvanometrical appearances nor any effect like induction upon the other helix could be perceived, although the active power of the battery was proved to be great, by its heating the

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