hands of a watch. 227. This experimental law can be extended to avoltaic circuit of any size and shape whatever. For; con- MAGNETISM. 197 ceive the voltaic circuit filled up by a surface, and thissurface divided into a number of closed curves by linescutting each other at right angles, whose… … Each closed curve may be regarded as a plane circuit,and for it by the above experiment may be substituteda small magnetic shell whose strength is in a certain ratioto the current-strength, and similarly for all the otherelementary circuits; and the magnetic shell-elements sub-stituted for each…
Electricity
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