Levy, Augusts Michel
LEVY, AUGUSTS MICHEL (1844- ), French geologist, was born in Paris on the 7th of August 1844. He became inspector-general of mines, and director of the Geological Survey of France. He was distinguished for his researches on eruptive rocks, their microscopic structure and origin; and he early employed the polarizing microscope for the determination of minerals. In his many contributions to scientific journals he described the granulite group, and dealt with pegmatites, variolites, eurites, the ophites of the Pyrenees, the extinct volcanoes of Central France, gneisses, and the origin of crystalline schists.
He wrote Structures et classification des r aches eruptives (1889), but his more elaborate studies were carried on with F. Fouque". Together they wrote on the artificial production of felspar, nepheline and other minerals, and also of meteorites, and produced Mineralogie micrographique (1879) and Synthese des mineraux et des roches (1882). Levy also collaborated with A. Lacroix in Les Mineraux des roches (1888) and Tableau des mineraux des roches (1889).
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)