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Joly writes: 'The subject of dust-figures produced by electrical discharge has received much attention at various times. In the following notes I have refrained, to the best of my knowledge, from going over old ground. The subject has been reviewed in Lehmann’s recently published ‘Molekularphysik.’ It is a sufficient substitute for the customary résumé of past observations to refer to that work. (1.) When a spark discharge occurs in a homogeneous dielectric medium, the path of discharge, as is known, in general lies in a fairly straight line between the points of discharge.'

Annotations in pencil and ink. Includes one page of diagrams of the formation of spark tracks and the path of incandescent particles at the poles.

Subject: Electricity

Received 15 June 1889. Read 20 June 1889. Communicated by George Francis Fitzgerald.

A version of this paper was published in volume 47 of the Proceedings of the Royal Society as 'Observations on the spark discharge'.

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Ink and graphite pencil on paper
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40 pages

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John Joly

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John Joly, Paper, 'Observations on the spark discharge' by John Joly, 1889, PP/15/8, The Royal Society Archives, London,, accessed on 27 May 2024

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  • Proceedings Papers

    Dates: 1882 - 1894

    The archival collection known as 'Proceedings Papers' is comprised of manuscripts and occasional proofs of scientific papers sent to the Royal Society which were read before meetings of Fellows and printed in full in the Proceedings of the Royal Society.

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