Klem — The History of Science in St. Louis. 101 



hope that, in some years from this, there will be a definite clearing 

 up of this point." 



Nicollet was the first explorer who made much use of 

 the barometer for obtaining the elevation of our great 

 interior country above sea level. He was a most industri- 

 ous, indefatigable, earnest, and accurate explorer, and 

 the map which embodied the results of his labors was, in 

 the opinion of General G. K. Warren, "one of the great- 

 est contributions ever made to American geography. ' ' 



In 1839 Dr. Adolph Wislizenus 20 of St. Louis left on 

 a scientific tour with the annual caravan of the fur 

 traders. Wislizenus traveled up the Kansas river to 

 the Platte, along the Platte to Fort Laramie, over the 

 Black Hills and the Wind River Mountains to the Green 

 river rendezvous, and finally to Fort Hall on the Snake 

 river. Upon his return to St. Louis he published the re- 

 sults of this journey under the title of "Ein Ausflug nach 

 den Felsen-Gebirgen im Jahre 1839," an English trans- 

 lation of which, prepared by a son of Dr. Wislizenus, was 

 published by the Missouri Historical Society two years 

 ago. 



In 1842 John C. Fremont, 21 through the efforts of Sen- 

 ator Thomas H. Benton of Missouri, was selected by 



20 Memoir of a tour to northern Mexico connected with Col. Doni- 

 phan's expedition, in 1846 and 1847. By A. Wislizenus, M. D. 1848. 



Korner, Gustav. Das deutsche Element in den Vereinigten Staaten 

 von Nordamerika 1818-1848. 333-337. 1880. 



In memoriam Adolph Wislizenus, M. D. Trans. Acad. Sci. St. Louis. 

 5: xxxvii-xxxviii. 1889. 



Engelmann, G. J. Frederick Adolphus Wislizenus. Trans. Acad. 

 Sci. St. Louis. 5: 464-468. 1892. 



Spaulding, Perley. A biographical history of botany at St. Louis, 

 Missouri. Pop. Sci. Month. 1909: 244-246. 



Wislizenus, F. A. A journey to the Rocky mountains in the year 

 1839. By F. A. Wislizenus, M. D. Translated from the German with 

 a sketch of the author's life. 1912. 



2i Bigelow, John. Memoir of the life and public service of John 

 Charles Fremont. 1856. 



Upham, Charles Wentworth. Life, explorations, and public services 

 of John Charles Fremont. 1856. 



