Etats-Unis. 
Baltimore. American cliemical journal. 
Berkeley. University of California. Department of geology 
Boston. American Academy of arts and sciences. 
Cambridge. Muséum of comparative zoology. 
Chicago. Academy of sciences. 
— Journal of geology. 
Colorado. College studies. 
Columbiis. Geological survey of Ohio. 
Denver, Colorado scientific society. 
Indianapolis. Indiana academy of sciences. 
Jefferson. Missouri geological survey. 
Lansing. Michigan academy of sciences. 
Lawrence. Office of Kansas University quaterly. 
Madison. Wisconsin academy of sciences, arts and letters. 
— Wisconsin geological and natural history surve^^ 
Missoiila. University of Montana. 
New-Haven. American journal of sciences. 
New-York. Academy of sciences. 
— American Institute of mining Engineers. 
— American Muséum of nataral history. 
— University of the State of Kew-York. 
— New-York state Education departement. 
Philadelphie. American philosophical Society. 
— Franklin institute. 
Rochester. Academy of sciences. 
— Geological society of america. 
St-Louis, Academy of Sciences. 
San-Francisco. California Academy of Sciences. 
Topeka. Kansas Academy of Sciences. 
Urbana. Illinois state geological Survey. University of Illinois. 
Washington. Geological Survey of the Territories. 
— Smithsonian Institution. 
Argentine. 
yres. Academia nacional de ciencias. 
— Museo pUblico. 
