"1631Z"^^ . "1568Z"^^ . "Johannes Hartmann (Amberg, January 14, 1568 \u2013 Kassel, December 7, 1631) was a German chemist.In 1609, he became the first Professor of Chemistry at the University of Marburg. His teaching dealt mainly with pharmaceuticals. He was the father-in-law of Heinrich Petraeus."@en . "1631-12-07Z"^^ . . . "Hartmann, Johannes"@en . . "German chemist" . "1568-01-14Z"^^ . .