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McConnel writes: 'Two years ago in the "Proceedings of the Royal Society" was published an account of some experiments on the plasticity of ice made by Mr Kidd and myself [see PP/12/26]. We proved the oft-repeated statement, that glacier ice is not plastic under tension, to be erroneous, and, indeed, that an ordinary bar of ice composed of several crystals will yield continuously either to pressure or tension. But we found that a bar cut out of a single crystal with its length at right angles to the optic axis showed no signs of continuous stretching, even when subjected to half the breaking stress; and other experiments convinced us that an ice crystal will not change its shape under either tension or pressure applied at right angles to its optic axis.'

Annotations in pencil and ink.

Subject: Physics / Crystallography

Received 29 May 1890 / 4 July 1890. Read 19 June 1890. Communicated by Richard Tetley Glazebrook.

A version of this paper was published in volume 48 of the Proceedings of the Royal Society as 'On the plasticity of an ice crystal. (Preliminary note.)'.

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Ink and graphite pencil on paper
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3 pages

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James C McConnel

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James C McConnel, Paper, 'On the plasticity of an ice crystal' by James C McConnel, 1890, PP/16/25, The Royal Society Archives, London,, accessed on 24 July 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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