Publisher's Synopsis
Excerpt from The London, Edinburgh and Dublin Philosophical Magazine and Journal of Science, Vol. 36: July-December 1893
When Ohm stated his law that current is proportional to he did not know that it was really true. It has turned out to be precisely true for copper and for sulphate of copper - the only substances for which it has been seriously tested but even if it had not been so accurate, its statement was a service, since it enabled half a century to walk in the light instead of in the dark. There is no evidence that it is accurately true for every variety of solid and liquid conductor, but by this time it is the fashion to assume its truth in ordinary simple cases. And rightly so, as it seems to me the burden of proof rests now with the enterprising experimenter who can detect a ?aw in it. His evidence will be listened to.
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