List of Exchanges. 
Philadelphia, Penn. - 
1. Academy of Natural Science. 
2. American Philosophical Society. 
3. Association of Engineering Societies. 
4. Commercial Museum. 
5. The Franklin Institute. 
6. Philadelphia Commercial Museum. 
7. Sugar Best. 
8. University of Pennsylvania. 
9. Zoological Society. 
Portland, Me. 
1. Portland Society of Natural History. 
Poughkeepsie, XL Y. 
1. Vassar Bros. Institute. 
Princeton, N. J. 
1. Museum of Geology and Archaeology. 
Pi.ipon, Wis. 
1. Ripon College. 
Rochester, N. Y. 
1. Rochester Academy of Sciences. 
Sacramento, Cal. 
1. University of California. 
2. State Mining Bureau. 
Salem, Mass. 
1. Essex Institute. 
2. American Institute for the Advancement of Science. 
San Francisco, Cal. 
1. California Academy of Sciences. 
Seattle, Wash. 
1. Library of University of Washington. 
2. Young Naturalists’ Association. 
Springfield, Ill. 
1. Geological Survey of Illinois. 
2. State Entomologist. 
