Q. INDEX TO THE REFERENCES. 627 



D. America. 



1. Journal of the Franklin Institute, devoted to Science and the Mechanic 

 Arts. Monthly. Philadelphia. 



2. Proceedings of the Academy of Natural Sciences of Philadelphia. 

 Monthly. Philadelphia. 



3. Proceedings of the Boston Society of Natural History. Occasionally. 

 Boston. 



4. The American Journal of Science and Art. (Silliman Dana.) Month- 

 ly. New Haven, Ct. 



5. The American Naturalist : a popular illustrated Magazine of Natural 

 History. Monthly. Salem, Mass. 



G. Scientific American : a journal of practical information in Art, Science, 

 Mechanics, Chemistry, and Manufactures. Weekly. New York. 



E. Netherlands. 



1 . Archives neerlandaises des Sciences exactes et naturelles publie'es par la 

 Socie'te hollandaise des Sciences a Harlem. Occasionallv. La Have. 



F. Switzerland. 



\ . Bibliotheque Universelle et Revue Suisse. Archives des Sciences phy- 

 siques et naturelles. Monthly. Geneva, 8vo. 



G. Italy. 



1. Rivista Scientifico-industriale compilata da Guido Vimercati. Month- 

 ly. Florence, 8vo. 



H. Denmark. 

 1. Tidsskrift for Fiskeri. Semi-annual. Copenhagen. 



