IV. On electrotorsion
George Gore · Proceedings of the Royal Society of London · 1874
Abstract This communication contains an account of a new phenomenon (of rods and wires of iron becoming twisted while under the influence of electric currents), and a full description of the conditions under which it occurs, the necessary apparatus, and the methods of using it. The phenomenon of torsion thus produced is not a microscopic one, but may be made to exceed in some cases a twist of a quarter of a circle, the end of a suitable index moving through a space of 80 centimetres (= 31 inches). It is always attended by emission of sound.