I9I3-] MINUTES. xi 



Residents of the United States 



George Francis Atkinson, Ph.D., Ithaca, N. Y. 



Charles Edwin Bennett, A.B., Litt.D., Ithaca, N. Y. 



John Henr}^ Comstock, B.S., Ithaca, N. Y. 



Reginald Aldvvorth Daly, Boston, Mass. 



Luther Pfahler Eisenhart, Princeton, N. J. 



George W. Goethals, Culebra, Canal Zone. 



William C. Gorgas, M.D., Sc.D., LL.D., Ancon, Canal Zone. 



Ross G. Harrison, A.B., Ph.D., M.D., New Haven, Conn. 



George Augustus Hulett, Princeton, N. J. 



Clarence E. McClung, A.M., Ph.D., Swarthmore, Pa. 



John Dyneley Prince, Ph.D., Sterlington, N. Y. 



Samuel Rea, Sc.D., Bryn Mawr, Pa. 



Henry Norris Russell, Ph.D., Princeton, N. J. 



Charles Schuchert, New Haven, Conn. 



Witmer Stone, A.M., Philadelphia. 



Foreign Residents. 



Sir Arthur John Evans, D.Litt., LL.D., F.R.S., Oxford, Eng. 

 Sir Joseph Larmor, D.Sc, LL.D., F.R.S., Cambridge, Eng. 

 Arthur Schuster, Sc.D., Ph.D., F.R.S., Manchester, Eng. 



Morning Session — lo o'clock. 



Edward C. Pickering, D.Sc, LL.D., F.R.S., Vice-President, in 



the Chair. 



The following papers were read : 



" The Potassium, Phosphorus, Nitrogen Cycles," by Charles E. 

 Munroe, Ph.D., LL.D., F.C.S., Professor of Chemistry, 

 George Washington University, Washington. 



" An Ammonia System of Acids, Bases and Salts," by Edward 

 C. Franklin, Chief of Division of Chemistry, U. S. Public 

 Health and Marine Hospital Service. Discussed by Dr. H. 

 C. Jones and Professor H. F. Keller. 



"Some Unsolved Problems in Radio-activity" (illustrated), by 



