Johann Schröder
German physician and pharmacologist
Johann Schröder was a German physician and pharmacologist who was the first person to recognise that arsenic was an element. In 1649, he produced the elemental form of arsenic by heating its oxide, and published two methods for its preparation. Wikipedia
Born: 1600, Bad Salzuflen, Germany
Died: 1664 (age 64 years), Frankfurt, Germany