Chicago. Academy of sciences. 
— Journal of geology. 
Colorado. College studies. 
Coliimbus. Geological survey of Oliio. 
Davenport. Academy of natural sciences. 
Denver. Colorado scientific society. 
Des-Moines. Jowa geological survey. 
Hamilton. Hamilton association. 
Indianapolis. Department of geology and natural resources. 
— Indiana academy of sciences. 
Jefferson. Missouri geological survey. Bureau of geology and 
mines. 
Lansing. Michigan academy of sciences. 
Lawrence. Office of Kansas university quarterly. 
Madison. Wisconsin academy of sciences, arts and letters. 
— Wisconsin geological and natural history survey. 
Missoula. University of Montana. 
New-York. Academy of science. 
— American institute of mining engineers. 
— American muséum of natural history. 
— Mining magazine. 
— State muséum of natural history. University of the 
State of Kew-York. 
Philadelphie. American philosophical society. 
— Franklin institute. 
Rochester. Academy of science. 
— Geological society of America. 
Rolla. Bureau of geology and mines of the state of Missouri. 
St-Louis. Academy of sciences. 
San-Francisco. California academy of sciences. 
Topeka. Kansas academy of sciences. 
Washington. Geological survey of the territories. Department of 
interior. 
— Smithsonian institution. 
» Mexique . 
Mexico. Comision geologica. Institutio geologico. 
— Sociedad cientifica « Antonio Alzate ». 
— Sociedad geologica mexicana. 
