Caspar Neumann (1683-1737) was a German-Polish chemist and apothecary. From 1704 to 1711 he was travelling apothecary to Frederick I of Prussia. Neumann travelled 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 travelled 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.
Reference:
(http://en.wikipedia.org/wiki/Caspar_Neumann_(chemist) [accessed 14 April 2017]).
Dates: to
Occupation: Unknown
Relationship to Sloane: Virtual International Authority File: