^M 



TRANSACTIONS 



AMERICAN PHILOSOPHICAL SOCIETY, 



HELD AT PHILADELPHIA, 



FOR PEOMOTiNG USEFUL KNOWLEDGE. 



VOLUME XVII -NEW SERIES. 



PART III 



Article V. — The Saprolegniaceae of the United States, with Notes on Other Species (tvith seven plates). 



By James Ellis Humphrey, Sc. D. 

 Article VI. — Researches upon the Phenomena of Oxidation and Chemical Properties of Oases {with 



three cuts and two plates). By Francis C. Phillips, Ph.D. 



i' i) i I a ti c I \) It i a : 



PUBLISHED BY T.HE SOCIETY. 



AND FOB SALE BY 



The American Philosophical Society, Philadelphia 

 N. TRUBNER & CO ,nd 59 LUDGATE HILL, LONDON. 



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PRINTEI 



VNY. 



