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Description

A printed proof of Thomson's paper. Thomson writes: 'Let ψ, φ, χ, ϑ be generalised coordinates of a system; and let A (ψ, φ, . . . . , ψ', φ', . . . . ) be the action in a path (2 above) from the configuration (ψ', φ',. . . .) to the configuration (ψ, φ, . . . .) with kinetic energy (E—V) with any given constant value for E, the total energy; V being the potential energy, of which the value is given for every possible configuration of the system.' Includes a postscript, dated 10 November 1891, in which Thomson discusses Henri Poincaré's 'Sur le problème des trois corps et les équations de la dynamique'.

Annotations in pencil and ink.

Subject: Physics / Mathematics

Received 12 November 1891. Read 26 November 1891.

A version of this paper was published in volume 50 of the Proceedings of the Royal Society as 'On instability of periodic motion'.

Reference number
PP/18/9
Earliest possible date
1891
Physical description
Ink and graphite pencil on paper
Page extent
10 pages
Format
Printed
Manuscript

Creator name

William Thomson

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Citation

William Thomson, Paper, 'On instability of periodic motion' by William Thomson, 1891, PP/18/9, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/pp_18_9/paper-on-instability-of-periodic-motion-by-william-thomson, accessed on 19 May 2026

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  • Proceedings Papers

    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.

    Dates: 1882 - 1894

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