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The Royal Society: Science in the Making

Letter, 'On soap lees and hard soap' from Claude Joseph Geoffroy to David Hartley

Reference number: L&P/1/77

Date: 23 July 1741

Description

Subject: Chemistry

Published in part in Philosophical Transactions, as 'Part of a letter from Monsieur Claud. Joseph Geoffroy, F. R. S. To David Hartley, M. A. F. R. S. containing his method of making soap-lees and hard soap, for medicinal uses'

Read 1 April 1742.

Reference number
L&P/1/77
Earliest possible date
23 July 1741
Physical description
Ink on paper
Page extent
24 pages
Format
Manuscript

Creator name

Claude Joseph Geoffroy

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Citation

Claude Joseph Geoffroy, Letter, 'On soap lees and hard soap' from Claude Joseph Geoffroy to David Hartley, 23 July 1741, L&P/1/77, The Royal Society Archives, London, https://makingscience.royalsociety.org/items/l-and-p_1_77/letter-on-soap-lees-and-hard-soap-from-claude-joseph-geoffroy-to-david-hartley, accessed on 12 January 2026

Link to this record

https://makingscience.royalsociety.org/items/l-and-p_1_77/letter-on-soap-lees-and-hard-soap-from-claude-joseph-geoffroy-to-david-hartley

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  • Letters and Papers

    'Letters and Papers' contains the scientific correspondence sent to the Royal Society through the 18th century, many of which were published in its journal.

    Dates: 1741 - 1806

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