MINUTES. vii 



by William D. Matthew, A.M., Ph.D., Curator of American 

 Museum of Natural History, N. Y. Discussed by President 

 Scott. 



" Characters and Restoration of the Sauropod Genus Camara- 

 sanriis Cope, from Type-Material in the Cope Collection of 

 the American Museum of Natural History," by Henry Fair- 

 field Osborn, Sc.D., LL.D., Research Professor of Zoology, 

 Columbia University, and Charles C. Mook. Discussed by 

 President Scott. 



"Energy Conception of the Cause of Evolution," by Henry 

 Fairfield Osborn, Sc.D., LL.D., Research Professor of Zool- 

 ogy, Columbia University. 



" The Parasitic Aculeata, a Study in Evolution," by William M. 

 Wheeler, Ph.D., Sc.D., Professor of Economic Entomology, 

 Bussey Institution, Harvard University. 



" Two Recent Entomological Problems — -The Pink BoUworm 

 and the European Corn Borer," by L. O. Howard, Ph.D., 

 LL.D., Chief of Bureau of Entomology, U. S. Department 

 of Agriculture, Washington. 



Hampton L. Carson, M.A., LL.D., Vice-President, in the Chair. 



" Hydration and Growth," by D. T. MacDougal, Ph.D., LL.D., 

 Director of the Department of Botanical Research, Carnegie 

 Institution of Washington, Tucson, Arizona. 



" Hydration of Colloids and Cell-Masses in Propionic Acid and 

 its Amino-Compounds," by D. T. MacDougal, Ph.D., LL.D., 

 Director of the Desert Laboratory, Tucson, Arizona, and H. 

 A. Spoehr. (By title.) 



" Sterility and Self-and-Cross-Incompatibility in Shepherd's 

 Purse," by George H. Shull, Ph.D., Professor of Botany and 

 and Genetics, Princeton LTniversity. 



" The Basis of Sex Inheritance in Sphccrocarpos," by Charles 

 E. Allen, Ph.D., Professor of Botany, University of Wiscon- 

 sin. (Introduced by Prof. Bradley M. Davis.) 



" Hydrogen-ion Concentration of Nutrient Solutions in Rela- 

 tion to the Growth of Seed Plants," by Benjamin M. Duggar, 

 A.M., Ph.D., Research Professor of Plant Physiology, Mis- 



