|Title||Letter, 'On soap lees and hard soap' from Claude Joseph Geoffroy to David Hartley|
|Date||23 July 1741|
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.
|Physical description||Ink on paper|
|Related material||DOI: 10.1098/rstl.1742.0025|
Fellows associated with this archive
|NA7765||Geoffroy; Claude Joseph (1685 - 1752)||1685 - 1752|
|NA6793||Hartley; David (? 1705 - 1757); physician||? 1705 - 1757|