SÉANCE DU 21 MAI 1855, 9SÔ 
À sketch oj the geology oj thc state oj Mississippi , par O. M. Lieber. 
New-York, 1854. 
Report on the agriculture and geology oj Mississippi, embrasirig a 
sketch oj the. social and natural history oj the state, par B. L. C. 
Wailes. Jackson, 1854. 
Texas , par Dr. Ferdinand Roemer. Bonn, 1849. 
Die Kreidebildungen von Texas urid ihre organise!, len Einschüssc. 
par Dr. Ferdinand Roemer. Bonn. 1852. 
TERRITOIRES, PAYS DES INDIENS, ROCKY MOUNTAINS ET CALIFORNIE. 
Account of an expédition front Pittsburgh to the Rocky rnountains , 
performed in the years 1819 and 1820, under the command oj 
major Stephen H. Long , par Edwin James, en 2 vol. Philadelphie, 
1823. 
Report intended to illustrate a Met}) oj the hydrographie al basin oj 
the uppe r Mississippi River, par-I.-N. Nicollet. Washington, 1 843. 
Report oj the exploring expédition to thc Rocky mountains in the 
year 1842, and to Oregon and Norlh Calijorni a in the years 
1843-44, par le capitaine J. C. Frémont. Washington, 1 845. 
Geographical memoir upon upper Calijorni a, par le capitaine J. C. 
Frémont. Washington, 1848. 
Notes oj a military reconnaissance jrotn Fort Leavenworth in Mis- 
souri to San Diego in California ; made in 1846-47, with the 
advanced Gnard oj the « Army of the kV es t » , par le major 
W.-H. Emory. Washington, 1848. 
Report of an eoçamination oj New-Mexico in the years 1 846-47, par 
le lieutenant J. W. Abert. Washington, 1848. 
Menioir of a tour to Northern Mexico , çonnected with colonel Doni- 
phâtRs expédition , in 1846-47, par À. Wislizenus. Washington, 
1848. 
Reports oj the secrctary oj war , with reconnaissance in New-Mexico , 
Texas , etc., par lieut. col. J.-E. Johnston, Capitaines French et 
Marcy, lieutenants J. -H. Simpson, Michler et Whiting. Washing- 
ton, 1 850. 
Report, oj lient, col P . St. -George Çooke oj his march from Santa- 
Fé, New- Mexico, to San Diego, upper California. Washington, 
1848. 
Journal oj captain A . R. Johnsto/j , first drageons , jrom Santa-Fé 
to San-Diego. Washington, 1 848. 
Report and map of the route from Fort Smith ( Arkansas ) to Santa - 
Fé ( New-Mexico ), par le lieutenant J. H. Simpson. Washington, 
1851. 
A report in the for ni of a journal , to the Quatermaster general, oj 
the march of the régiment of mounted Riflemen to Oregon , from 
may 10 to qctober 5, 1849, par le major O. Cross. Washington, 
1850. 
Report of the seçretary oj war, communicating information in relation 
