Men who Aided in Developing the Science of Geology. 105 



da}' of November, 1851, at the age of fifty-nine. He contributed to 

 Geology and Palaeontology, but is best known for his work upon 

 the Zoolog}' of New York. 



Dr. Daniel Drake died at his residence, in Cincinnati, on the 7th 

 day of November, 1852, at the age of sixty-seven years. He was best 

 known as a medical author aud successful practitioner of medicine. 

 He was the first writer who called attention to the drift scattered over 

 the Southern part of Ohio, and especially in the vicinity of Cincin- 

 nati. 



Charles B. Adams was born in Dorchester, Massachusetts, January 

 11, 1814, and died at St. Thomas, in the West Indies, on the 18th day 

 January, 1853. He was a professor in Amherst College in 1836; in 

 1837 he was at Marion College, Missouri ; and in 1838 at Middle- 

 burg College, Vermont. He was State Geologist of Vermont from 

 1845 to 1848, and made four annual reports. In 1852, in connection 

 with Professor Alonzo Gray, he published a school book under the 

 name "Elements of Geology." He was an original investigator in 

 zoology and geography, and a special student of the mollusca. His 

 ''Contributions to Conchology" and "Catalogue of Shells collected at 

 Panama, with notes on their synonomy, station and geographical dis- 

 tribution," are his best scientific publications. 



John C. Warren was born August 1, 1778, and died May 4,18564 

 In 1806 he was appointed Adjunct Professor of Anatomy and Surgery 

 at Harvard College, and in 1815 he was made Hersey Professor of 

 Anatomy and Surgery, from which position he retired in 1847. After 

 his retirement he prepared and published his celebrated work on the 

 "Mastodon giganteus." 



James G. Percival was born in Berlin, near Hartford, Connecticut, 

 September 15, 1795, and died at Hazel Green, Wisconsin, on the 2d of 

 May, 1856. He was eminent as a poet and a scholar. In 1835, he was ap- 

 pointed, in conjunction with Prof. C. U. Shepard, to make a survey of 

 the geology and mineralogy of the State of Connecticut. A report of 

 495 pages octavo was issued from New Haven in 1842, accompanied 

 by a geological map. In 1854 he was appointed State Geologist of 

 Wisconsin, and issued his first annual report in January, 1855. He 

 died before completing the 2d aunual report. 



Zadoc Thompson was born at Bridge water, Vermont, May 23, 1796. 

 and died on the 19th day of January, 1856, at Burlington, in the same 



