Credit: © The Royal Society
    Image number: RS.8465
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    ca. 1836
    Object type
    Archive reference number
    Content object
    A hydrometer with a brass hollow float and brass stem with scale inscribed. Together with its hinged wooden case and nine component weights.

    One of a number of hydrometers commissioned by the Royal Society's Excise Committee for a Treasury sponsored project: to devise a simple and practicable instrument to be used by excisemen in assesing the strength of spirits, wine and beer. The Committee were satisfired by Bates's hydrometer and recommended it to the Treasury.

    Robert Brettell Bate (1782-1847) British maker of scientific instruments was not a Fellow of the Royal Society.
    Object history
    First designed by Sir Benjamin Sikes, this model was manufactured on a large scale by his son in-law, Robert Brettell Bate.
    Associated place
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