appendix b: biographical sketches. 713 



Troo.st, Gerard. Chemist and geologist. 



Born in Bois-le-Duc, Holland, March 15, 1776; died in Nashville, Term., August 

 14, 1850. Came to the United States in 1810 and was one of the founders of the 

 Philadelphia Academy of Natural Sciences in 1812; chosen its first president. In 

 1821, was appointed professor of mineralogy in Philadelphia Museum, and profes- 

 sor of chemistry in the Philadelphia College of Pharmacy. Professor of chemistry, 

 geology, and mineralogy in University of Nashville, Tenn., 1828-1850. State geolo- 

 gist of Tennessee, 1831-1850. 



Biogr. Appleton's Cylo. of Araer. Biog. 



L. ('. Glenn. Amer. GeoL, XXXV, No. 2, 1905, pp. 72-94. 



Tro.MEY, Michael. Geologist. 



Born in Cork, Ireland, September 29 (St. Michael's Day), 1805; died in Univer- 

 sity, Ala., March 30, 1857. Came to America when about 17 years of age and became 

 a teacher on the eastern shore of Virginia, but afterwards went to Troy, N. Y., and 

 was graduated from Rensselaer Institute. State geologist of South Carolina in 1844. 

 In 1847, was appointed professor of geology, mineralogy, and agricultural chemistry in 

 the University <>f Alabama, and in 1848, was appointed State geologist without salary. 

 In 1854, relinquished his professorship at the University in order that he might give 

 all his attention to the survey. 



Biogr. Amer. Geol., XX, Oct. 1897, pp. 206-212. 

 Tyson, Philip Thomas. Chemist. 



Born in Baltimore, Md., June 23, 1799; died there December 16, 1877. State agri- 

 cultural chemist of Maryland 1858. 

 Van Rensselaer, Stephen. Patron. 



Born in New York City, November 7, 1765; died in Albany, N. Y., January 26, 1839. 

 Established the Rensselaer Polytechnic Institute in Troy, N. Y., in 1826. A general 

 patron of the sciences and the pioneer of American geological surveys, Eaton's early 

 work on the geology of the Erie Canal region being carried on at his expense. 



Biogr. Anier. Jour. Sci., XXXVI, 1839, pp. 156-164. 

 Vanuxem, Lardner. Chemist and stratigrapher. 



Born in Philadelphia, Pa., July 23, 1792; died in Bristol, Pa., January 25, 1848. 

 Professor of chemistry and geology in Columbia College, S. C, from 1820 to 1826. In 

 charge of third district New York survey from 1836-1842. 



Biogr. Pop. Sci. Monthly, April, 1895, pp. 833-84u. 

 Wachsmuth, Charles. Paleontologist. 



Born in Hanover, Germany, September 13, 1829; died in Burlington, Iowa, Feb- 

 ruary 7, 1896. Came to America in 1852 and entered upon a mercantile career, but 

 going West for his health took up scientific pursuits, in which he continued until his 

 death. For several years assistant to Louis Agassiz in the Museum of Comparative 

 Zoology. 



Biogr. Chas. R. Keyes in American Geologist, XVII, 1896, pp. 131-136. 

 Walcott, Charles Doolittle. 



Born in New York Mills, N. Y., March 31, 1850. Became assistant, New York 

 State survey, 1876. Connected with U. S. Geological Survey, as geologist and paleon- 

 tologist since 1879, and as Director since 1894. From January, 1897, to July, 1898, 

 Acting Assistant Secretary of Smithsonian Institution. The Cambrian rocks and 

 faunas of the United States have been his especial subjects of research. 

 White, Charles Abiathar. Paleontologist and stratigrapher. 



Born in North Dighton, Mass., January 26, 1826. Graduated from Iowa College. 

 State geologist of Iowa, 1866-1870; professor Iowa State University, 1867-1873; pro- 

 fessor Bowdoin College, Maine, 1873-1875; geologist and paleontologist to various 

 United States Government surveys, 1874-1892. Connected with the U. S. National 

 Museum since 1876. 



