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This is most likely the enlarged copy from the original letter from Huygens to Robert Moray dated 2 February 1663 (EL/H1/18). The copy was ordered, along with an English translation of the text (EL/H1/19), at the meeting of the Royal Society on 28 January 1663. The paper was read the following week on 4 February 1663.

There is no accompanting text to the illustration.

Subject: Pnuematics / Scientific apparatus and instruments

Reference number
Earliest possible date
28 January 1663
Physical description
Ink on paper
Page extent
2 pages

Creator name

Christiaan Huygens

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Christiaan Huygens, Paper, figure of 'pneumaticall engine' by Christian Huygens, 28 January 1663, CLP/4i/23, The Royal Society Archives, London,, accessed on 21 May 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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