Heinrich Friedrich Gretschel (21 October 1830, in Prietitz near Elstra, Germany – 2 February 1892, in Freiburg, Switzerland) was a German mathematician and scientist.
On 28 April 1851 he was enrolled at Leipzig University, where he studied mathematics, natural sciences and ancient languages.
[2][3][1] On 7 January 1873 he became professor of mathematics and geometric construction at the Bergakademie Freiberg, a position that he held until his death in 1892.
[4] Gretschel wrote and lectured in a wide range of fields, publishing books about meteorology, physics, chemistry, astronomy, geometry and cartography.
[1] He and Georg Bornemann wrote about the organization of the periodic table, published as Das Naturliche System der Elemente (1883).