8 The American Geologist. Jauuary, 1897 
1833. 
Acting- Professor of Chemistry, Mineralogy and Geology at the Wes- 
leyan University at Middletown, Conn., during the recess of his course 
of instruction at West Point, by permission of the Secretary of War. 
18.35. 
On topogi-aphical duty, June to December, 1835, as Assistant Geolo- 
gist to G. W. Featherstonhaugh, making a geological examination of the 
country from Green bay to Coteau des Prairies; and Mr. Mather made 
a report and a topographical map of the St. Peter's river valley of Min- 
nesota. 
Ordered to Regiment at Fort Gibson. November, 1835, and marched 
into Choctaw country May, 18.36, in command of Company D, 7th Infy. 
1836. 
Resigned from the Army, August 2.3d, 1836. 
Appointed Professor of Chemistry, Min. and Geology in the Univer- 
sity of Louisiana. 1835. Declined. 
Geologist of the First District (S. E. quarter) of New York, contain- 
ing 21 counties, from July, 1836, to 1814. (Made five Annual Reports 
and one Final Geological Report.) 
1837. 
Geologist superintending the Geological Survey of Ohio from 1837 to 
1840. (Made two annual rejjorts and one on the collections). 
1838. 
Geologist making a Geological Reconnaissance of Kentucky, 1838 to 
1839. (Made one report). 
1842. 
Professor of Natural Science in the Ohio University, 1842-1845. 
1845. 
Vice-President and Acting President, and Professor of Natural Sci- 
ence at the Ohio University, 1845. 
Geologist and Mining Engineer to various mining companies on Lake 
Superior in 1845, 1846 and 1847, and others in Virginia, New York, Mas- 
sachusetts, etc. 
1846. 
Acting Professor of Chemistry, Mineralogy and Geology at the Mari- 
etta College, Ohio, January to March, 1846. Acting temporarily. Un- 
willing to accept the professorship in consequence of other arrange- 
ments. 
1847. 
Vice-President and Professor of Natural Science in the Ohio Univer- 
sity, 1847 to December, 1850. 
1850. 
Delegate of the Jackson County Agricultural Society to the State 
Agricultural Convention of Ohio, annually 1850, 1851, 1852, 1853, 1854, 
1855, 1856 and 1858. 
1850-4. 
Corresponding Secretary of the Ohio State Board of Agriculture 1850- 
1854. (In charge of the office of the Board, conducting the correspond- 
