Exchanges. : 



United States — Continued. 

 New York — Continued. 



Association of Engineering Societies. 



Botanical Garden. 



Chemical Society. 



Linnaean Society of New York. 



Mathematical Society. 



Microscopical Society. 



Public Library. 



Torrey Botanical Club. 

 Northfield (Minn.). 



Carleton College Observatory. 

 Oberlin(0.). 



Oberlin College Library. 

 Peoria (III.). 



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'g Medical College. 



Pharmaceutical Association. 



" Polyclinic." 



Wagner Free Institute of Science. 



Zoological Society. 

 Portland (Me.). 



Society of Natural History. 

 Poughkeepsie (N. T.). 



Vassar Brothers Institute. 

 Princeton (N. J.). 



Museum of Geology and Archaeology. 

 Rochester (N. Y.). 



Academy of Science. 



Geological Society of America. 

 Roll a (Mo.). 



Missouri School of Mines. 

 Sacramento (Cal.). 



State Mining Bureau. 

 Salem (Mass.). 



Essex Institute. 



Peabody Academy of Science. 



