1868.] 215 [Perry. 



began to appear. In 18'2G he published a " Manual of Mineralogy 

 and Geology." From 1828 to '34, he lectured on Chemistry before 

 the successive classes of his Alma Mater. He was elected Professor 

 of Natural History in Williams College in 1833, and lield the position 

 until 1858, when he was transferred to the Department of Mineral- 

 ogy and Geology. The latter position he continued to retain, at least 

 nominally, until his death. 



During the progress of the Geological Survey of his native State, 

 he prepared a '' Report on the Quadrupeds of Massachusetts," which 

 was printed in 1840. On the organization of the Geological Survey 

 of New York in 1836, he was appointed one of the Geologists-in- 

 chief. In addition to his several annual reports, he made a " Final 

 Report on the Geology of the Second District," which Avas published 

 in 1842, and contains some account of his Taconic System. He Avas 

 at the same time intrusted with the Agricultural Department of the 

 Survey for the whole State. His observations and investigations in 

 this direction were embodied in an extended Report, which occupies 

 five quarto volumes, and was published in 1844. There appeared in 

 the fii-st volume of this Report — it was also issued in a separate form — 

 an exposition of the Taconic System, much more matured and com- 

 plete than the one contained in the Report on the Geology of the 

 Second District. In January, 1845, he became, and for some time 

 continued to be, Editor of the American Journal of Agriculture and 

 Science, which was issued quarterly at Albany. In this enterprise he 

 had as associates, fii'st and from the start. Dr. A. J. Prime, afterward 

 A. Oslx)rne. At about the same time, or not very long after, be ac- 

 cepted a professorship, and for a while performed the duties apper- 

 taining to it, in the Albany Medical College. 



In 1851 he was appointed State-Geologist of North Carolina, and 

 entered upon the duties of his new position in January, 1852. Dur- 

 ing the latter year he published a short account of the Geology of 

 that State. Ills first regular report appeared in 185C; his next, an 

 octavo volume of three hundred and fourteen pages in 185 7; and his 

 third in 1858. During all this time, with the exception of the last 

 year or two, as I am informed, he was in the habit of giving an an- 

 nual course of lectures at Williams College; also of performing not a 

 little additional labor connected with his favorite pursuits. As an 

 evidence of this, the first volume of his American Geology, compris- 

 ing two parts, appeared in 1855. He likewise found time to prepare 



