XVI. On electrotorsion
George Gore · Philosophical Transactions of the Royal Society of London · 1874
Abstract Wiedemann lias experimentally examined† the influence of magnetism upon the mechanical torsion of iron wire, and has shown that an iron wire hung in the centre of a helix and twisted is more or less untwisted when a current traverses the helix. But as the torsion in his experiments was produced by the combined influence of a voltaic current and previous mechanical twist, and is quite a distinct phenomenon from that produced by the combined influence of electric currents only, which forms the subject of this communication, and as no one appears to have discovered the particular class of phenomena which are treated of in this investigation, I take an opportunity of making known my experiments and the new facts I have found. [Since the publication of the abstract of this paper in the ‘Proceedings of the Royal Society,’ vol. xxii. p. 57, January 8, 1874, Professor Wiedemann (to whom I had sent a copy of that abstract) has kindly written to me as follows:—“ You have found independently some results which I had already published in the year 1862 in Poggen-dorff’s ‘Annalen,’ vol. cxvii. p. 208. A short abstract of these experiments is also given in my ‘Treatise on Galvanism, &c.’ (1st edition, vol. ii. p. 445; 2nd edition, vol. ii. p. 565), where you will find my complete theory of the relations between magnetism and torsion.”]