. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. AMERICAN" GEOLOGY DECADE OF 1870-1879. 561 of preparation by sedimentation; (2; a stage of yielding by horizontal pressure; and (3) a stage of erosion or mountain decay. Le Conte was born in Liberty County, Georgia, February 26, 1823, and grew to manhood under influences of ease and enjoyment such as have fallen to the lot of few American geologists. Educated as a physician, he early gave up practice and in 1850 re- sketch of Le Conte.
. Annual report of the Board of Regents of the Smithsonian Institution. Smithsonian Institution; Smithsonian Institution. Archives; Discoveries in science. AMERICAN" GEOLOGY DECADE OF 1870-1879. 561 of preparation by sedimentation; (2; a stage of yielding by horizontal pressure; and (3) a stage of erosion or mountain decay. Le Conte was born in Liberty County, Georgia, February 26, 1823, and grew to manhood under influences of ease and enjoyment such as have fallen to the lot of few American geologists. Educated as a physician, he early gave up practice and in 1850 re- sketch of Le Conte. moved to Cambridge, in Massachusetts, to become a student of Agassiz. In less than two years he, how- ever, returned to Georgia, where he became professor of natural science at Oglethorpe University. His stay here was brief. In December, 1852, he became attached to the University of Georgia, at Athens, and, in 1856, professor of chemistry and geology in South Carolina College, at Columbia. Here he remained, enduring the vicis- situdes of the civil war, but abandoned his beloved South in L869 (at a period when men of his t}rpe were most needed) to become professor of geology, zoology, and botany in the Uni- versity of California, at Berkeley. Here he remained until his death, in 1902. In 1866 E. W. Hilgard, at the suggestion of Professor Henry, of the Smithsonian Institution, visited the salt deposits of Petite Islands and published the Hilgard's Work at , . r . Petite Anse, results or his observations Louisiana, 1872. • i o ? i • r^ in the Smithsonian Contri- butions to Knowledge in 1872, under the title On the Geology of Lower Louisiana and the Salt Deposits of Petite Anse. As was to be expected, Hilgard differed completely with Thomassy, whose work has been noted, and who, it will be remembered, regarded the island as of volcanic origin. On the contrary, the island, and others of the group, were regarded as Cretaceous outliers, with mappings of drift and other alluvial m
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