a;^^ 



MINUTES. [May;, 



The following papers were read : 

 " One Dimensional Gases and the Reflection of Molecules from 



Solid Walls." 

 " Recent Progress in the Study of the Iodine Resonance Spec- 

 tra, with a description of a Long Focus Spectroscope of High 

 Power," by Robert Williams Wood, A.B., LL.D., Profes- 

 sor of Experimental Physics, Johns Hopkins University. 

 Discussed by Dr. Brush, Prof. Noyes and Dr. Webster. 

 Symposium on the Earth : Its Figure, Dimensions and the 

 Constitution of Its Interior 

 " From the Astronomical Standpoint," by Frank Schlesinger, 



Ph.D., Director of Allegheny Observatory, Pittsburgh. 

 " From the Geological Standpoint," by T. C. Chamberlin, 

 Ph.D., LL.D.^ Head of Department of Geology, University 

 of Chicago. 

 " From the Seismological Standpoint," by Harry Fielding Reid, 

 Ph.D., Professor of Dynamical Geology and Geography, 

 Johns Hopkins University, Baltimore. 

 " From the Geophysical Standpoint," by John F. Hayford, Di- 

 rector of College of Engineering, Northwestern University, 

 Evanston, 111. (Introduced by Prof. Schlesinger.) 

 These papers were discussed by Professors H. F. Reid, Arthur 

 G. Webster, E. W. Brown, C. L. Doolittle, Frank Schlesinger and 

 W. H. Hobbs. 



Stated Meeting May 7, 19 15. 



William W. Keen, M.D., LL.D., President, in the Chair. 



Letters accepting membership were received from : 

 John J. Abel, M.D., Baltimore, Md. 

 Edwin Plimpton Adams, Ph.D., Princeton, N. J. 

 John Merle Coulter, Ph.D., Chicago, 111. 

 Whitman Cross, Ph.D., Washington, D. C. 

 William J. Gies, M.D., New York City. 

 Philip Bovier Hawk, Ph.D., Philadelphia. 

 Emory Richard Johnson, Sc.D., Philadelphia. 

 John Anthony Miller, Ph.D., Swarthmore, Pa. 



