xiv MINUTES. [April 20. 



Residents of the United States. 



Albert T. Clay, B.A., Ph.D., New Haven, 

 George W. Crile, M.D., Ph.D., Cleveland, 

 Arthur Louis Day, Ph.D., Washington, 

 Edward Curtis Franklin, Ph.D., Washington, 

 John Grier Hibben, Ph.D., LL.D., Princeton, 

 G. Carl Huber, M.D., Ann Arbor, 

 James Furman Kemp, Sc.D., New York, 

 Arthur Henry Lea, B.A., Philadelphia, 

 John Matthews Manly, Ph.D., Chicago, 

 Edward Bennett Rosa, Sc.D., Ph.D., Washington, 

 Frank Schlesinger, A.M., Ph.D., Allegheny, Pa., 

 George E. de Schweintiz, M.D., Philadelphia, 

 Frederick Winslow Taylor, M.E., Philadelphia, 

 Roland Thaxter, A.M., Ph.D., Cambridge, Mass., 

 Oswald Veblen, Princeton. 



Foreign Residents. 



George Friedrich Julius Arthur Auwers, Ph.D., Berlin, 

 Wilhelm Ostwald, Sc.D., LL.D., Leipzig, 

 Magnus Gustaf Retzius, Stockholm. 

 The following papers were read: 



" Some Geochemical Statistics," by Frank W. Clarke, Sc.D., 

 LL.D., U. S. Geological Survey. Discussed by Professor 

 Hobbs and Dr. Clarke. 



" Some General Results of the Work of a Century on the Atomic 

 Weights of the Chemical Elements," by Gustavus D. Hin- 

 richs, of St. Louis. 



" Absorption Spectra and the Solvate Theory of Solution " 

 (illustrated), by Harry C. Jones, Ph.D., Professor of Phys- 

 ical Chemistry, Johns Hopkins University. 



"The Classification of Carbon Compounds," by Marston T. 

 Bogert, Ph.B., LL.D., Prof, of Chemistry, Columbia Univ. 



"An Autocollimating Mounting for a Concave Grating" (illus- 

 trated), by Horace Clark Richards, Ph.D., Professor of 

 Mathematical Physics, LTniversity of Pennsylvania.. 



