THIS paper consists of three parts. The first treats of the experiments made by Dr. Siemens, with a view of determining the law of the variation of electrical resistance in metallic conductors, with ...

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AT the meeting of the British Association, just coming to an end, it was pointed out to the Committee of Section A, by Mr. E. H. Griffiths, that the general adoption of the method of thermometry, ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...