A Vernier-like device for measuring the relative expansion of different metals when heat is applied. Engraving by T. Jefferys.

    Reference:
    473449i
    Catalogue details

    Licence: Public Domain Mark

    Credit: A Vernier-like device for measuring the relative expansion of different metals when heat is applied. Engraving by T. Jefferys. Wellcome Collection. Source: Wellcome Collection.

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