Daniel Sennert (25 November 1572 – 21 July 1637) was a renowned German physician and a prolific academic writer, especially in the field of alchemy or chemistry.

Daniel Sennert was born in 1572 in the city of Breslau (now Wrocław, Poland), at the time part of the Habsburg monarchy.

Corpuscularianism differs from modern atomic theory in a number of significant ways, most noticeably a lack of a mathematical argument for its existence,[3] something Sennert specifically rejected.

[5] Sennert's theories were based on an experiential and experimental evidence that he gathered both from eyewitness accounts and his own laboratory experience.

In the classic "reduction to the pristine state," the silver was then precipitated out of the aqua fortis by the addition of salt of tartar and then heated in a crucible to return it to its recognizable metallic form.