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A paper on weather by Robert Hooke. The illustrated instrument relies on a ripe wild-oat beard attached to a dial, which curls and straightens depending on the moisture in the air. Hooke indicates the dial should be created in the manner described by Emmanuel Maignan (Perspectiva Horaria (Rome, 1648), p. 89 and illustration).

Subject: Engineering / Meteorology

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1 page

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Robert Hooke

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Robert Hooke, Paper, description of a hygroscope by Robert Hooke, 1660-1679, CLP/4i/25, The Royal Society Archives, London,, accessed on 12 April 2024

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  • Classified Papers

    Dates: 1592-1741

    The 'Classified Papers' of the Royal Society are papers from British and international natural philosophers and scholars categorised according to subject areas.

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