Xll BIOGRAPHICAL NOTICES. 



In conjunction with James H. Dana, Dr. Pickering read, Feb. 20, 1838, before the 

 Yale Natural History Society, of which he was a member, a " Description of a Crus- 

 taceous Animal belonging to the genus Caligus, C. Americanus," which occupies 

 forty pages of vol. xxxviii. of Silliman's " Journal." 



Dr. Pickering was appointed a member of the scientific corps attached to the 

 United States Exploring Expedition, under command of Lieutenant Charles Wilkes. 

 He was placed on board of the flag-ship " Vincennes." The expedition sailed from 

 Hampton Roads Aug. 19, 1838, and arrived off Sandy Hook, N. Y., June 10, 1842, 

 after an absence of nearly four years. He is recorded among those present at the 

 stated meeting of the Academy July 5, and frequently afterwards until he again 

 went abroad. The first record of his presence after his return is May 20, 1845, an d 

 from that date he occasionally attended meetings every year. He was last present 

 Nov. 7, 1876. 



Oct. 11, 1S43, Dr. Pickering left Boston and visited Egypt, Arabia, India, and 

 the eastern part of Africa, for the sake of extending and verifying observations made 

 while attached to the United States Exploring Expedition. Upon his return he 

 settled in Boston, and prepared his " Races of Man and their Geographical Distri- 

 bution," quarto, pp. 447, published by Charles C. Little and James Brown, Boston, 

 1 S48, being vol. ix. of the Exploring Expedition. 



In 1850 he contributed a paper, Enumeration of the Races of Man, to the 

 " Edinburgh New Philosophical Journal," vol. xlviii. 



His work entitled "The Geographical Distribution of Animals and Plants,'' 

 quarto, pp. 212, being vol. xv. of the Exploring Expedition, was published by Little 

 & Brown, Boston, 1854. 



In the " Proceedings " of the American Academy of Arts and Sciences are re- 

 corded his observations on the Egyptian computation of time, October, 1S49 » on 

 the Egyptian Astronomical Cycle, May, 1850; on Sulphur Vapor, Dec. 9, 1856; on 

 the Coptic Alphabet, March 8, 1859; on the Geographical Distribution of Species, 

 March 22, 1859, and Dec. 11, i860; and on the Jewish Calendar, Oct. 11, 1864. At 

 the request of the Secretary of the Institution he prepared a paper on the Gliddon 

 Mummy Case in the Museum of the Smithsonian Institution, in June, 1867, which 

 is published in vol. xvi. of the " Smithsonian Contributions to Knowledge." 



The " Geographical Distribution of Animals and Plants. Part II. Plants in their 

 Wild State," quarto, was published by the Naturalists' Agency, Salem, 1876. It is 

 preceded by a note : " The following 524 pages comprise about one-half of a prepared 

 volume, the printing of which was suspended in i860. — Charles Pickering." 



The great work of Dr. Pickering's life, " The Chronological History of Plants," 

 to which he had devoted sixteen years of laborious research, was only recently com- 

 pleted, and is now passing through the press. 



This imperfect summary of work completed is sufficient evidence of his unre- 

 mitting industry, and suggests that he fully utilized his opportunities to qualify 

 himself for research during the ten years he zealously wrought in the offices and on 



