MINUTES. vii 



" Probable Masses of Comets," by Henry Norris Russell, Ph.D., 

 Professor of Astronomy, Princeton University. 



" The Relationship of Stellar Motions to Absolute Magni- 

 tudes," by Walter S. Adams, A.M., Sc.D., Assistant Director 

 of Mt. Wilson Solar Observatory, Pasadena, Cal., and G. 

 Stromberg. 



" Nebulae," by V. M. Slipher, Ph.D., Director of the Lowell 

 Observatory, Flagstaff, Arizona. (Introduced by Prof. C. 

 L. Doolittle.) 



"Early Man in America," by Edwin Swift Balch, A.B., of 

 Philadelphia. 



"The Influence of the Admixture of Present Immigrant Races 

 Upon the More Original Stock," by Charles B. Davenport, 

 S.B., Ph.D., Director, Station for Experimental Evolution, 

 Cold Spring Harbor, Long Island. 



" A New Babylonian Account of the Creation of Man," by 

 George A. Barton, Ph.D., LL.D., Professor of Biblical 

 Literature, Bryn Mawr College. 



Afternoon Session — 2 o'clock. 



Albert A. Michelson, Ph.D., Sc.D., LL.D., F.R.S., Vice-President, 



in the Chair. 



Mr. Percy W. Bridgman, of Cambridge, Mass., a recently elected 

 member, subscribed the Laws and was admitted into the Society. 

 The following papers were read : 

 " Crushing of Crystals," by Percy W. Bridgman, Assistant Pro- 

 fessor of Physics, Harvard University. 

 " Structure of the Spectra of the Phosphorescent Sulphides 

 (Describing Measurements by Drs. H. E. Howe, H. L. 

 Howes and Percy Plodge)," by Edward L. Nichols, Ph.D., 

 D.Sc, LL.D., Professor of Physics, Cornell University. 

 " The Corbino Effect in Liquid Mercury," by Edwin Plimpton 



Adams, Ph.D., Professor of Physics, Princeton University. 

 " Spontaneous Generation of Heat in Recently Hardened Steel," 

 by Charles Francis Brush, Ph.D., Sc.D., LL.D., of Cleveland. 

 I. " Condensation and Evaporation of Metal Films." 



