Exchanges. xvii 



United States — Continued. 

 New York — Continued. 



Association of Engineering Societies. 



Botanical Garden. 



Chemical Society. 



Liunaeau Society of New York. 



Matheniatical Society. 



Microscopical Society. » 



Public Library. 



Torrey Botanical Club. 

 Nortbfield (Minn.). 



Carleton College Observatory. 

 Oberlin(0.). 



Oberlin College Library. 

 Peoria (^Ul.). 



Scientific Association. 

 Philadelphia (Pa.). 



Academy of Natural Science. 



American Entomological Society. 



American Philosophical Society. 



"Journal of Comparative Medicine and Surgery." 



" Journal of Pharmacy." 



Library Company. 



Numismatic and Antiquarian Society, 



Pennsylvania Woman's Medical College. 



Pharmaceutical Association. 



" Polyclinic." 



Wagner Free Institute of Science. 



Zoological Society. 

 Portland (3fe.). 



Society of Natural History. 

 Pouobkeepsie (JV. T.). 



Vassar Brothers Institute. 

 Princeton (iV^. J.). 



Museum of Geology and Archaeology. 

 Rochester (^N. Y.). 



Academy of Science. 



Geological Society of America. 

 RoUa {Mo.). 



Missouri School of Mines. 

 Sacramento (CaL). 



State Mining Bureau. 

 Salem {Mass.). 



Essex Institute. 



Peabody Academy of Science. 



