756 Historical Sketch of the Science of Botany [December, 
introduce the culture of the silkworm in Sweden. The extensive 
botanical collections were worked up by Linnaeus and embodied 
in his herbarium, where they exist yet. 
Linnzeus published, 1753, the first edition of his “ Species 
Plantarum,” in which he described 5938 species, all that was 
known at that time, and of which 5323 were phenogamous. In 
all his writings the number of species he was acquainted with 
was 8551 (7728 phenogamous and 825 cryptogamous). Amongst 
these are 1075 species either common to the eastern and western 
continents or only North American, inclusive of the Arctic re- 
gions and exclusive of Mexico. 
Another contributor to the herbarium of Linnzeus was Cad- 
‘wallader Colden, Lt. Governor of New York, who was born in 
Scotland, 1688, and died in New York, 1776. The catalogue of 
his collection is published in “ Acta Societatis Scientiarum Up- 
salensis, 1743-1744. His daughter, Miss Jenny Colden, wrote a 
Flora of New York, with drawings, the manuscript of which she 
transferred, before her death, to Wangenheim ; afterwards it was 
incorporated into the Banksian Library, but never published. 
Some Canadian plants were described by the French mission- 
ary, Xavier de Charlevoix, in his “ Histoire et description générale 
de la nouvelle France, 1744.” About the same time, John Bar- 
tram (born 1701, died 1777 in Philadelphia) traveled to Lake 
Ontario, and published his valuable observations in 1751. His 
son, Wm. Bartram (1739-1823), was the first to extend his botan- 
ical excursions to the Southern Alleghanies. He left Philadel- 
phia in 1773, traveled through Florida and Georgia to the Chero- 
kee country, and went through Alabama to Mobile in 1776. He 
published his voyage in Philadelphia, 1791. This valuable work 
was afterwards translated into the German, in 1794, and in French, 
in 1799. : 
John Mitchell, an American physician in Virginia, published 
additions to Linnzeus’ first edition of Genera Plantarum in his 
“ Dissertatio de Principiis Botanicorum.” 
Reinhold Forster, naturalist to Cook’s second expedition, com- 
piled a catalogue of the plants of North America, in 1771, with- 
out descriptions. 
A number of species, common to the Southern States and the 
_ West Indies, were made known by the important discoveries of ee 
Chas. Plumier (1690-1695), of Nic. Jos. de Jacquin (17 54-1759) oe 
