— feB 2 3 — 
Etats Unis. 
Baltimore. 
Berkeley. 
Boston. 
Cambridge. 
Chicago. 
American Chemical journal. 
University of California. Department of geology. 
American Academy of arts and sciences. 
Muséum of comparative zoology. 
Academy of sciences. 
Journal of geology. 
Journal of geology. 
Colorado. 
Columbus. 
College studies. University of Colorado. 
Geological survey of Ohio. 
Denver. Colorado scientific society. 
Des Moines. Iowa geological Survey. 
Galveston. University of Texas. 
Indianapolis. Indiana academy of sciences. 
Jefferson. Missouri geological survey. 
Lansing. Michigan academy of sciences. 
Lawrence. Kansas University. 
Madison. Wisconsin academy of sciences, arts and letters. 
Wisconsin geological and natural history survey. 
Mi s soûla. University of Montana. 
New Haven. American journal of sciences. 
New-York. 
Academy of sciences. 
American Institute of mining Engineers. 
American Muséum of natural history. 
University of the state of New-York. 
Philadelphie 
New-York state Education departement. 
. American philosophical Society. 
Franklin institute. 
Rochester. 
Academy of sciences. 
Geological society of america. 
Geological society of america. 
St-Louis. 
Academy of Sciences. 
University of Missouri. 
S an-F rancis co. California Academy of Sciences. 
Top ka. Kansas Academy of Sciences. 
Urbana. Illinois state geological Survey University of Illinois. 
Washington. Geological Survey of the Territories. 
— Smithsonian Institution. 
