694 REPORT OF NATIONAL MUSEUM, 1904. 



of Natural History; was conchologist to Wilkes Exploring Expedition for two years. 

 Commanded United States vessels from outbreak of rebellion until he lost his life. 



Biogr. Win. II. Dall. Some Anier. Oonchologists. Proc. Biolog. Soc. of Washn., IV, 1886-88, 

 pp. 108-llli 



Cox, Edward Travers. Geologist. 



Born in Culpeper County, Va., April 21, 1821. Studied geology and chemistry 

 under D. D. Owen and served as assistant on surveys of Kentucky and Arkansas. 

 In 1868-1880, State geologist of Indiana. 



COZZENS, ISSACHAR. 



Bom in Newport, R. I., December 15, 1780, died in Guttenberg, N. J., April 17, 1865. 

 Cozzens's claim to recognition as a geologist, so far as his publications are concerned, 

 is based upon his geological history of Manhattan or New York Island, dated 1843. 

 Biogr. Genl. A. W. Vogdes. Amer. Geolog., XXIV, No. 6, 1899, pp. 327-8. 



Dale, Thomas Nelson. Geologist. 



Born in New York City, November 25, 1845. Professor of geology, zoology, and 

 botany, Drury College, Missouri, 1877; professor of geology, Vassar College, 1878; con- 

 nected with U. S. Geological Survey since 1885 — as field assistant, 1885-1889; assist- 

 ant geologist, 1890-91; geologist, 1892 to date. Instructor in Williams College — in 

 geology, 1893; botany, 1897; resigned, 1901. 



Dall, William Healey. Naturalist. 



Born in Boston, Mass., August 21, 1845. Studied natural sciences under Louis 

 Agassiz. Paleontologist on U. S. Geological Survey, 1884-1898. Since 1880, attached 

 to U. S. National Museum; since 1893, also professor invertebrate paleontology, Wag- 

 ner Institute of Sciences, Philadelphia. 



Dana, Edward Salisbury. Mineralogist. 



Born in New Haven, Conn., November 16, 1849. Graduated from Yale University 

 in 1870; also studied in Heidelberg and Vienna. Member of Yale faculty since 

 1874. Editor American Journal of Science. Author of Text-Book and System of 

 Mineralogy. 



Dana, James Dwight. Geologist. 



Born in Utica, N. Y., February 12, 1813; died in New Haven, Conn., April 14, 

 1895. Entered Yale in 1830, but withdrew in August, 1833, to become instructor in 

 mathematics in the Navy. In 1836, reentered Yale, remaining two years, serving as 

 assistant to Professor Silliman. In 1838-1842, geologist and mineralogist to the Wilkes 

 Exploring Expedition. In 1846, became editor of American Journal of Science. In 

 1850, appointed professor of natural history in Yale College, the title in 1864 being 

 changed to professor of geology and mineralogy. Retained this chair until 1890, when 

 he retired from active university work. ' ' The foremost geologist of America and one 

 of the foremost of the world." 



Biogr. E. S. Dana. Am. .lour. Sci., XLIX, 1895, pp. 1-28. 



C. E. Beecher, Am. Geol., XVII, 1896, pp. 1-16. 



Joseph Le Conte. Bull. Geol. Soc. Amer., VII, 1895, pp. 461-479. 



D. C. Gilman. The Life of James Dwight Dana, 1899. 



Dana, Samuel Luther. Chemist. 



Born in Amherst, N. II., July 11, 1795; died in Lowell, Mass., March 11, 1868. 

 Graduated in medicine in 1818 and practiced until 1826. Chemist to the Newton 

 Chemical Company, from about 1826-1834. Consulting chemist of Merrimac Manu- 

 facturing Company, at Lowell, Mass., 1834-1868. With his brother J. F. Dana, 

 published a work on the mineralogy and geology of Boston and vicinity. 



Biogr. Pop. Sci. Monthly, pp. 692-697. 

 Am. Jour. Sci., XLV, 1868, p. 425. 



