“ COMSTOCK LODE. A remarkable compound fissure vein, rich in gold and silver, located in Storey County, Nev., on the eastern slope of Mount Davidson, a northeastern spur of the Sierras, at a point about 20 miles east of the California State line. Its discovery in 1859, when it received the name Washoe, created great excitement and led to the building up of Virginia City. The vein is about four miles in length, and varies in width from zero at the ends to 3000 feet at the middle point. ”

“ Besides its economic value, the Comstock Lode is of great interest in other directions. One of the earliest classifications of igneous rocks (q.v.) was attempted in connection with the study of the geologic relations of the ore bodies by Von Richthofen in 1868; and Van Hise, Iddings, and Becker have at a later period perfected the modern classification of igneous rocks with aid of considerable information derived from the Comstock Lode and Sutro Tunnel. ”