Letter 3674

Caspar Neumann to Hans Sloane – October 15, 1729


Item info

Date: October 15, 1729
Author: Caspar Neumann
Recipient: Hans Sloane

Library: British Library, London
Manuscript: Sloane MS 4050
Folio: ff. 214-215



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Transcription

Caspar Neumann (1683-1737) was a German-Polish chemist and apothecary. From 1704 to 1711 he was traveling apothecary to Frederick I of Prussia. Neumann traveled to England in 1713 and worked for the Dutch surgeon Abraham Cyprianus for three years. It was at this time he became acquainted with Isaac Newton and Hans Sloane. He then traveled with George I’s entourage throughout Germany in 1716. From 1719 he was the Royal Court Apothecary and in 1723 he conveyed the secret formula for Prussian blue, the first synthetic dye, to the Royal Society (http://en.wikipedia.org/wiki/Caspar_Neumann_(chemist)).




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