. "1683Z"^^ . "Caspar Neumann (or Neuman) (July 11, 1683 \u2013 October 20, 1737) was a German/Polish chemist and apothecary."@en . "1757Z"^^ . "Caspar Neumann"@en . . "Polish chemist" . . "Neumann, Caspar"@en . "1737-10-20Z"^^ . "1683-07-11Z"^^ . . . . . "1757-10-20Z"^^ . "1737Z"^^ .