R. INDEX TO THE REFERENCES. 637 



16. Field and Stream. Weekly. Chicago. 



17. The Engineering and Mining Journal. Weekly. New York. 



E. Netherlands. 



1. Archives neerlandaises des Sciences exactes et natnrelles publiees par 

 la Societe hollandaise des Sciences a Harlem. Occasionally. La Haye. 



F. Switzerland. 



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

 siques et naturelles. Monthly. 8vo. Geneva. 



G. Italy. 



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

 ly. 8vo. Florence. 



II. Denmark. 

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



