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It will then pass from m as a centre in both directions on the wire, and will descend to the hoop h. F rom which it will pass into the liquid in the canal a, and thenco to the cup c, with which the liquid is in metallic communication, and, in fine, from d it will pass to the negative pole of the battery. By this arrangement, therefore, a circular current flows round the exterior surface of the vase v, while two descending currents constantly flow upon the wire at right angles to this circular current. The circular current being fixed, and the vertical currents being movable, the latter will receive a motion of con- tinued rotation by the action of the former ; and in the case here supposed, this rotation will be in a direction contrary to the direction of the circular current. If the connections be reversed by the reotrope, the direction of the circular current will be re- versed, but at the same time that of the vertical currents on the wire will be also reversed; and, consequently, no change will take place in the direction of the rotation. prev next |