Extract of a letter, from Monsieur [Claude Joseph] Geoffroy to Hans Sloane, dated at Paris

Reference number: EL/G2/27

Date: 01 January 1740

Description

States that he will be sending three new plans of Paris; that M Hellot, as new examiner of dyes, will soon produce the chemical theory of indigo; sends an extract of observations of Mr Stephen's medicine which has had some success (see EL/G2/28 for account)
Original letter, which now no longer exists, was in French and dated 9 February 1740

Reference number: EL/G2/27
Earliest possible date: 01 January 1740
Page extent: 2 pages
Format: Manuscript
Also available on Early Modern Letters Online: View

Creator name

Claude Joseph Geoffroy

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Citation

Claude Joseph Geoffroy, Extract of a letter, from Monsieur [Claude Joseph] Geoffroy to Hans Sloane, dated at Paris, 01 January 1740, EL/G2/27, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/el_g2_27/extract-of-a-letter-from-monsieur-claude-joseph-geoffroy-to-hans-sloane-dated-at-paris, accessed on 12 August 2026

Link to this record

https://makingscience.royalsociety.org/items/el_g2_27/extract-of-a-letter-from-monsieur-claude-joseph-geoffroy-to-hans-sloane-dated-at-paris

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Hierarchy

This item is part of:

'Early letters': letters from correspondents in natural philosophy sent to the Royal Society and its Fellows
1613-1740 Reference number: EL
Early Letters G2
1722-1740 Reference number: EL/G2

Related Fellows

Hans Sloane
Recipient
Claude Joseph Geoffroy
Author

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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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