Leopold Heinrich Fischer was a Germanzoologist and mineralogist born 19 December 1817 at Fribourg-en-Brisgau and died 2 February 1886 in the same town.He was the son of d’Aloys Fischer. He studied medicine at Fribourg-en-Brisgau but also at Vienna. Fischer practised medicine in Freiburg-in-Brisgau and from 1845 taught zoology and mineralogy there. Initially an assistant, he became a professor in 1859. His most significant works are
Chronologischer Überblick über die allmalige Einführung der Mikroskopie in das Studium der Mineralogie, Petrographie und Paläontologie (1868)
Kritische mikroscopy Studien (1869, 1871-1873)
Nephrit und Jadeit nach ihren mineralogischen Eigenschaften, sowie nach ihrer urgerschichtlishen und ethnographischen Bedeutung (1875)
and many other scientific articles.
He was one of the best specialists in the classification of insects of his time. After much research in geology, he devoted himself to the study of the prehistoric people and studied stone tools from an evolutionary point of view and also their geographical distribution.His collections are in the Naturhistorisches Museum in Vienna.