1838 – He was born on the 20th day of March at Bonn.
1861 – He was educated in his native town, and graduated Ph.D. at the university.
1863 – He became professor of geology in Vienna, but in early years he was engaged in teaching geology and mineralogy.
1868 – He became a professor in the University of Lemberg.
1870 – He was made professor of mineralogy and geology in the University of Leipzig. He wrote numerous papers and essays during his time.
1912 – On the 12th day of June this year he died.
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