Paper, 'The electrolysis of steam' by Joseph John Thomson Thomson writes: 'It is well known that steam is split up into hydrogen and oxygen when an electric discharge passes through it. A very careful examination of the laws of this phenomenon was made more than thirty years ago by Perrot; as his results are very remarkable, and seem to be not at all well known, I will describe, as briefly as possible, his apparatus, and the results he obtained with it.' Annotations in pencil and ink. Includes four pages of diagrams of experimental apparatus. Subject: Physics / Electricity Received 18 February 1893. Read 9 March 1893. A version of this paper was published in volume 53 of the Proceedings of the Royal Society as 'The electrolysis of steam'. 1893