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THE CORRESPONDENCE OF SCHWEINiITZ AND TORREY 291 
Candolle, Augustin Pyramus de (1778-1841). Famous Swiss botanist; 
author of many works, of which perhaps the best known is the 
“Prodromus.” 
Casström, Samuel Niklas (1763-1827). Swedish statesman; Knight 
the Polar Star; one of Thunberg’s earliest pupils at Upsala; 
his dissertation (1781) was entomological, and he never published 
anything in botany, although known to his friends and corre- 
spondents as one who was interested in that science. 
Collins, Zaccheus (1764-1831). Philadelphia philanthropist; member 
of various learned societies; correspondent of Muhlenberg, Elliott, 
Nuttall, Torrey, and other botanists; highly esteemed for his 
botanical knowledge; but published nothing. For him Nuttall 
named the genus Collinsia. 
Conrad, Solomon White (1779-1831). Philadelphia bookseller and 
publisher; minister of the Society of Friends; amateur naturalist 
for years; during the last two years of his life professor of botany 
in the University of Pennsylvania; father of Timothy Abbott 
Conrad, the famous conchologist. 
Cooley, Dennis (1789-1860). Physician; first at his native place, 
South Deerfield, Mass.; for three years, 1822-25, at Monticello, 
Georgia; and from 1827 at Washington, Macomb County, Michi- 
gan, where he was postmaster for 23 years. He was from his youth 
an ardent field-botanist, and accumulated one of the largest private 
herbaria in America; this was presented by his widow, in 1863, to 
the Michigan Agricultural College. 
Cooper, William (1798-1864). Well-known zoologist, his interest 
in botany being secondary but keen; original member, and for 
46 years an officer, of the Lyceum of Natural History of New York 
(now the New York Academy of Sciences); father of James Gra- 
ham Cooper, naturalist of the Pacific Railroad Survey and later 
of the Geological Survey of California. i 
Cürie, Peter Friedrich (1777-1855). Moravian clergyman; bishop for 
thirty years (1825-55). He was the author of a small pocket 
key to the plants of middle and northern Germany (1823), which 
proved its usefulness by passing through many editions up to as 
late as 1891. He seems to have been almost’ unknown. to his 
botanical contemporaries; it is therefore interesting to learn that 
he was one of the most intimate friends of Schweinitz in Germany. 
Darlington, William (1782-1863). Physician, statesman, and banker, 
of West Chester, Pennsylvania; member of many scientific societies 
