178 The Virginia (Richmond) Meeting 



Section on Botanical Sciences. F. E. Denny, Boyce Thompson Institute 

 for Plant Research. "Production of Ethylene by Plants." 



Section on Anthropology. John Swanton, U. S. Bureau of American 

 Ethnology. "Some Thoughts on the Problem of Progress and Decline." 

 Science 89: 253-258. 1939. 



Section on Psychology. Calvin P. Stone, Stanford University. "Indi- 

 vidual Differences as Points of Departure for Research in Animal Psy- 

 chology." 



Section on Historical and Philological Sciences. R. C. Archibald, Brown 

 University. "Mathematics, and Poetry and Drama." Science 89: 19-26, 

 46-50. 1939. 



Section on Social and Economic Sciences. Stuart A. Rice. "Standards 

 of Living as Functions of Science and of Social Organization." Science 90: 

 167-172. 1939. 



Section on Engineering. Joseph W. Barker, Columbia University. "En- 

 gineering Planning vs. Planned Economy." 



Section on Medical Sciences. Thomas M. Rivers, Rockefeller Institute 

 for Medical Research, New York. "The Nature of Viruses." 



Section on Agriculture. E. C. Auchter, U. S. Bureau of Plant Industry, 

 Washington, D. C. 'The Inter-relations of Soils and Plant, Animal and 

 Human Nutrition." Science 89: 421-427. 1939. 



Section on Education. Ralph W. Tyler, The University of Chicago. 

 Basic Considerations in the Improvement of Educational Tests." 



"r> 



Symposia 



"Reaction Rates in Organic Chemistry" (5 papers). Section on Chemis- 

 try. 



"Natural Resins" (4 papers). Section on Chemistry. 



"Phenanthrene and Related Compounds" (6 papers). Section on Chem- 

 istry. 



"The Importance of Geophysics to the Study of Continental Borders" 

 (9 papers). Section on Geology and Geography, American Geophysical 

 Union, Geological Society of America and Section on Astronomy. 



"Geology of the Coastal Plain and Continental Shelf" (12 papers). Sec- 

 tion on Geology and Geography and Geological Society of America. 



"Chromosome Structure" (4 papers). American Society of Zoologists 

 and Genetics Society of America. 



"Color Changes in Animals, Their Significance and Activation" (6 pa- 

 pers). American Society of Zoologists. 



"Mating Types and Their Interactions in Ciliate Infusoria; Determina- 

 tion, Inheritance and Relation to .Sexuality" (6 papers). American Society 

 of Zoologists. 



