394 Geographical Notices. 
Lovlis, ABOVE THE GULF oF Mrexico.—In the Transactions of 
the Academy of Science.in St. Louis, vol. i, No. 4, 1860, there 
is an article by Dr. Geo. Engelmann on the elevation of St. Louis 
above the Gulf of Mexico, from which the following statements 
are derived. 
“A knowledge of the exact altitude of St. Louis is important 
as an element in the physical geography of North America, not 
ent explorers during the last twenty years and more, by Nicol- 
let, Fremont, Owen, Wislizenus, Emory, Stansbury, and several 
of the Pacific Railroad exploring expeditions, took the altitude 
of St. Louis as their starting point, and were based to a great 
extent on the barometrical observations of those explorers com- 
with mine. 
“Mr. J. N. Nicollet was the first who ascertained the elevation 
geography of the Mississippi Valley, based on careful instru- 
mental observation. He laid down an abstract of his labors in 
Dr. A. Wislizenus next calculated the elevation of St. Louis. 
His results are published in his Report on a Tour to Northern 
