EXCHANGES AND PRESENTATIONS. 



308 Chicago ... ... Academy of Sciences. 



309 Cincinnati ... ^Cincinnati Society of Natural History. 



310 Coldwatejr ... Michigan Library Association. 



311 Davenport (Iowa) * Academy of Natural Sciences. 



312 Denver ^Colorado Scientific Society. 



313 Hoboken (N.J.)... ^Steven's Institute of Technology. 



314 Iowa City (Iowa) ^Director Iowa Weather Service. 



315 Minneapolis ... ^Minnesota Academy of Natural Sciences. 



316 Newhaven (Conn) ^Connecticut Academy of Arts. 



* American Chemical Society. 



* American Geographical Society. 

 American Museum of Natural History. 



^Editor Journal of Comparative Medicine and 



Veterinary Archives. 

 ^Editor Science. 



*New York Academy of Sciences. 

 *New York Microscopical Society. 

 *School of Mines, Columbia College. 



* Academy of Natural Science. 

 ♦American Entomological Society. 



* American Philosophical Society. 

 ♦Franklin Institute. 



♦Second Geological Survey of Pennsylvania. 

 ♦Wagner Free Institute of Science. 

 *Zoological Society of Philadelphia. 

 ♦American Association for the Advancement of 



Science, 

 ♦Essex Institute. 

 ♦Peabody Academy of Sciences. 



♦Academy of Science. 



♦California Academy of Sciences. 



*California State Mining Bureau. 



♦American Medical Association. 



*Bureau of Education (Department of the Interior). 



♦Bureau of Ethnology. 



*Chief of Engineers (War Department) . 



♦Chief of Ordnance (War Department). 



♦Chief Signal Officer (War Department). 



*Commissioner of Agriculture. 



*Director of the Mint (Treasury Department). 

 Library (Navy Department). 



♦National Academy of Sciences. 



♦Office of Indian Affairs (Department of the 

 Interior) . 



♦Philosophical Society. 



. *Secrctary (Department of the Interior). 



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