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The Royal Society: Science in the Making

Letter, from Antoni van Leeuwenhoek to the Royal Society, dated at Delft

Reference number: EL/L3/11

Date: 25 September 1699

Description

Observations of the circulation of blood in tadpoles: blood vessels; clotting; computation of quantity of flowing blood, capillaries
Red-chalk figures attached to EL/L3/12
Read to the Royal Society on 29 November 1699
EL/L3/10 for covering letter
EL/L3/12 for English translation
Transcribed in JBO/10/152
Transcribed and translated in 'Alle de brieven van Antoni van Leeuwenhoek', edited, illustrated and annotated by Committee of Dutch Scientists, vol 12, p 335
English translation printed in 'Philosophical Transactions', vol 22, no 260, p 447

Reference number
EL/L3/11
Earliest possible date
25 September 1699
Page extent
12 pages
Format
Manuscript
Also available on Early Modern Letters Online
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Creator name

Antoni van Leeuwenhoek

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Citation

Antoni van Leeuwenhoek, Letter, from Antoni van Leeuwenhoek to the Royal Society, dated at Delft, 25 September 1699, EL/L3/11, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/el_l3_11/letter-from-antoni-van-leeuwenhoek-to-the-royal-society-dated-at-delft, accessed on 12 August 2026

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https://makingscience.royalsociety.org/items/el_l3_11/letter-from-antoni-van-leeuwenhoek-to-the-royal-society-dated-at-delft

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  • Early Letters

    The archival collection known as 'Early Letters' is composed of original manuscript letters sent to, or collected by, the Royal Society from English and foreign correspondents.

    Dates: 1613 - 1740

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