98 MINUTES. [April 7, 8 and 9, 



'^Sources of Error in the Determination of the Atomic 

 Weight of Nitrogen," by Prof. Theodore W. Richards, of 

 Cambridge, Mass. Discussed by the President. 



"The Constituents of the Venom of the Rattlesnake," by 

 Prof. John Marshall, of Philadelphia. Discussed by^ Mr. 

 Joseph Willcox, Prof. William B. Scott and Dr. Marshall. 



" Trisulphoxyarsenic Acid," by Prof. LeRoy W. McCay, 

 of Princeton. 



" The Atomic Weight of Tungsten," by Prof. Edgar F. Smith 

 and Mr. F. F. Exner, of Philadelphia. Discussed by Prof. 

 Barker and Prof. E. J. Houston. 



'' The Expansion of Algebraic Functions at Singular Points," 

 by Prof. Preston A. Lambert, of Bethlehem, Pa. Introduced 

 by Prof. C L. Doohttle. 



Afternoon Session, 2 P.M. 

 Vice-President Scott in the Chair. 



'' The Continuum and the Theory of Masses," by Prof. I. J. 

 Schwatt. Introduced by Prof. C. L. Doolittle. 



"An Attempt to Correlate the Marine with the Fresh and 

 Brackish Water Mesozoic Formations of the Middle West," 

 by Prof. John B. Hatcher, of Pittsburg, Pa. Discussed by 

 Profs. Osborn, Scott and Heilprin. 



"The Miocene Rodentia of Patagonia," by Prof. William. 

 B. Scott, of Princeton, N. J. Discussed by Prof. Osborn. 



"Recent Advances in Our Knowledge of the Evolution of 

 the Horse," by Prof. Henry F. Osborn, of New York. Dis- 

 cussed by Profs. Conklin, Heilprin, Scott and Mr. Willcox. 



"The Yukaghir Language," by Mr. Waldemar Jochelson, 

 of New York. Introduced by Dr. Franz Boas. Discussed by 

 Dr. Franz Boas. 



"The Horizontal Plane of the Skull," by Dr. Franz Boas, 

 of New York. 



