via ■ MINUTES. [April i8, 



Mason, M.D., LL.D., Professor of Chemistry, Rensselaer 

 Polytechnic Institute, Troy, N. Y. 

 " Determination of Uranium and Vanadium in Carnotite Ores 

 of Colorado," by Andrew A. Blair, Philadelphia. 



Friday, April i8. Morning Session — Q.^f, o'clock. 

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



The following papers were read : 



"The Uses and Needs of Selachology (The Study of Sharks 

 and Rays)," by Burt G. Wilder, M.D., Emeritus Professor of 

 Neurology and Vertebrate Zoology, Cornell University. 



"Interpretations of Brain Weight" (illustrated), by Henry H. 

 Donaldson, Ph.D., D.Sc, Professor of Neurology at The 

 Wistar Institute of Anatomy and Biology, Philadelphia. 



"The Correlation of Structural Development and Function in 

 the Growth of the Vertebrate Nervous System " (illustrated), 

 by George E. Coghill, Ph.D., Professor of Zoology, Denison 

 L'^niversity, Granville, Ohio (introduced by Dr. H. H. Don- 

 aldson). 



" The Correlation of Structure and Function in the Develop- 

 ment of the Nervous System" (illustrated), by Stewart 

 Paton, M.D., Lecturer in Biology, Princeton L^niversity (in- 

 troduced by Dr. A. C. Abbott). 



" The Relation Between the Physical State of the Brain Cells 

 and Brain Function (experimental and clinical)," by George 

 W. Crile, M.D., Ph.D., Professor of Clinical Surgery, West- 

 ern Reserve University, Cleveland. Discussed by Professor 

 Conklin, Dr. Paton, Dr. Minot and Professor Nipher. 



" Life of Cells Outside the Organism " (illustrated), by Ross G. 

 Harrison, M.D., Ph.D., Professor of Comparative Anatomy, 

 Yale University (introduced by Dr. A. C. Abbott). Dis- 

 cussed by Dr. Crile and Dr. Donaldson. 



" Heredity and Selection," by William E. Castle, Ph.D., Pro- 

 fessor of Zoology, Harvard University. 



" The Nature of Sex and the Method of Its Determination " 



