Excerpt from The London and Edinburgh Philosophical Magazine and Journal of Science, Vol. 11: July December, 1837
I. On the Electro-magnetic conducting Power of Wires of different Qualities and Dimensions, and an Inquiry into the Efficiency of the Galvanometer for determining the Laws of its Variation. By Peter Barlow, F.R.S., Cor. Mem. Inst. France, &c. &c.
In the Bakerian Lecture for 1833, Mr. Christie has given the details of a long and interesting series of experiments on the magneto-electric conducting power of wires of different lengths and diameters; from the results of which he infers that the law of conduction in this case is, that it varies directly as the square of the diameter, and inversely as the length of the wire; and in a subsequent part of the same article, by a comparison of the experiments of different authors, he infers that the same law has place in electro-magnetic conduction. My object in this paper is, to explain the anomalies that have been observed, and to inquire whether the deflections produced by the galvanometer ought to be considered as proper measures of the conducting power of the wire without reference to the power of the battery.
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