National Telegraphic Union · New York : N.T.U. · leaf 212
t it by means of a spring, the bobbinfollows it in all its movements. The wires of the two bobbins are connected together,in the common point a, with the pole of a galvanic bat-tery E, the pole being connected with two resistances Rand x, and through these with the other ends of the… … It is evident that the resistance in the bobbins beingequal, as also their dimensions and initial magnetic effectsupon the needle suspended between them, if we makethe resistance x equal to R, the currents in the twobranches will be equal, and the magnet-needle thereforebalanced between them only…
Telegraph
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