The New International Encyclopædia/Tschermak, Gustav

TSCHERMAK, chĕr'mȧk, (1836&mdash;). An Austrian mineralogist. He was born at Littau, Moravia; was educated at the University of Vienna, and in 1868 was appointed a professor in the university and director of the Royal Mineralogical Cabinet. In 1877 he resigned the directorship. His contributions to the proceedings of the Vienna Academy are very numerous, and treat for the most part subjects of crystallography and petrography. He is also a prominent authority on meteorites. In 1871 he established at Vienna the Mineralogische Mitteilungen, published since 1878 as the Mineralogische und petrographische Mitteilungen. His publications include: Die Porphyrgesteine Oesterreichs (1869); Die mikroskopische Beschaffenheit der Meteoriten (1883); and a Lehrbuch der Mineralogie (1884; 5th ed. 1897).