LEVY, AMY (1861-1889), English poetess and novelist, second daughter of Lewis Levy, was born at Clapham on the 10th of November 1861, and was educated at Newnham College, Cambridge. She showed a precocious aptitude for writing verse of exceptional merit, and in 1884 she published a volume of poems, _A Minor Poet and Other Verse_, some of the pieces in which had already been printed at Cambridge with the title _Xantippe and Other Poems_. The high level of this first publication was maintained in _A London Plane Tree and Other Poems_, a collection of lyrics published in 1889, in which the prevailing pessimism of the writer's temperament was conspicuous. She had already in 1888 tried her hand at prose fiction in _The Romance of a Shop_, which was followed by _Reuben Sachs_, a powerful novel. She committed suicide on the 10th of September 1889.
LEVY, AUGUSTE 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 roches éruptives_ (1889), but his more elaborate studies were carried on with F. Fouqué. Together they wrote on the artificial production of felspar, nepheline and other minerals, and also of meteorites, and produced _Minéralogie micrographique_ (1879) and _Synthèse des minéraux et des roches_ (1882). Levy also collaborated with A. Lacroix in _Les Minéraux des roches_ (1888) and _Tableau des minéraux des roches_ (1889).
LEVY (Fr. _levée_, from _lever_, Lat. _levare_, to lift, raise), the raising of money by the collection of an assessment, &c., a tax or compulsory contribution; also the collection of a body of men for military or other purposes. When all the able-bodied men of a nation are enrolled for service, the French term _levée en masse_, levy in mass, is frequently used.