Paper, 'On some phenomena in vacuum-tubes' by David Salomons Salomons writes: 'This paper is a contribution upon the phenomenon known as striae, or bands, in vacuum tubes. As far as I can learn from the sources of information available to me, no one has yet discovered how to produce a predetermined number of bright and dark bands in a tube having an open or free path.' Annotations in pencil and ink. Includes 22 pages of diagrams of experimental observations. Subject: Physics Received 30 April 1894 / 24 July 1894. Read 21 June 1894. Communicated by David Edward Hughes. A version of this paper was published in volume 56 of the Proceedings of the Royal Society as 'On some phenomena in vacuum-tubes'. 1894