BB 21 
Des-Moines. Jowa geological survey. 
Iiidianapoîis. Indiana acadeiny of sciences. 
Lansing. Michigan academy ot’ sciences. 
Lawrence, Office of Kansas University quaterly. 
New-Haven. American journal of sciences. 
New- York. Academy of sciences. 
— American Institute of mining Engineers. 
— American Muséum of natural liistory. 
— New-York state Education department. 
Philadelphie. American philosopliical Society. 
— Franklin Institute. 
Rochester. 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 tlie Territories. 
— Smitlisonian Institution. 
Argentine. 
Biienos-Ayres. Academia nacional de ciencias. 
— Annales del Museo Nacional. 
Mexique. 
Mexico. Comission geologica. Instituto geologico. 
— Sociedad cientifica « Antonio Alzate ». 
— Sociedad geologica Mexicana. 
PÉROU. 
Lima. Boletin del Cuerpo de ingenieros de minas del Peru. 
Montevideo. Museo Nacional de Montevideo. 
Brésil. 
Rio. Annales da Escola de Minas de Ouro-Preto. 
