Paper, 'On the production of transient electric currents in iron and steel conductors by twisting them when magnetised or by magnetising them when twisted' by J A [James Alfred] Ewing Ewing observes that an iron or steel wire subjected to longitudinal magnetisation by a surrounding solenoid gave, when twisted, a current along itself, which was observed by means of a ballistic mirror galvanometer in circuit with the wire. When the twist was that of a common screw the transient current flowed along the wire from the nominal north pole to the nominal south pole. An opposite twist gave an oppositely directed current. Annotations in pencil and ink throughout. Note on front reads 'June 21/82 Experimental part to be printed in [Proceedings].' Subject: Physics / Electromagnetism Received 7 September 1881. Read 17 November 1881. Communicated by H C [Henry Charles] Fleeming Jenkin. Written by Ewing at the University of Tokyo. A version of this paper was published in volume 36 of the Proceedings of the Royal Society as 'On the production of transient electric currents in iron and steel conductors by twisting them when magnetised, or by magnetising them when twisted'. 16 July 1881