After studying at the
University of Vienna, where he specialized in the natural sciences, he became there a lecturer on
geology. In 1882 he was appointed professor at the
University of Czernowitz. Eight years later he received a similar appointment at
Prague, but soon after went to Vienna, where he became professor of mineralogy, succeeding
Gustav Tschermak von Seysenegg as such, of whose periodical
Mineralogische und Petrographische Mittheilungen he became editor. He published many papers on the science of geology and mineralogy, but he was best known on account of his researches in the field of rock-forming minerals and how they may be determined by means of their
light-refractive properties. The results of these studies were published by the
Vienna Academy (1893). His doctoral students include
Adelheid Kofler. == References ==