The Denver Meeting 161 



Affiliated with Section on Botanical Sciences 



American Phytopathological Society, Pacific Division (o -f- 12 papers) 

 American Society of Plant Physiologists, Western Division (31 -(- 10 



papers) 

 American Fern Society 

 Botanical Society of America, Pacific Section (8 + 5 papers) 



Affiliated with Section on Zoological and Botanical Sciences 



Ecological Society of America (25 + 3 papers) 

 Western Society of Naturalists (7 + 5 papers) 



Affiliated with Section on Social and Economic Sciences 



Econometric Society (3+15 papers) 

 American Statistical Association (3 + 13 papers) 



Affiliated with Section on Engineering 

 The Institute of Aeronautical Sciences (7 papers) 



Affiliated with Section on Medical Sciences 



Society for Experimental Biology and Medicine, Pacific Coast Branch 

 and Southern California Branch (o -|- 11 papers) 



Affiliated with Section on Agriculture 



Western Society of Soil Science (21+4 papers) 



Society of American Foresters, Denver Section ( o -f- 16 papers) 



General Sessions 



Herbert M. Evans, Director of Institute of Experimental Biology, Uni- 

 versity of California. "The Development of Our Knowledge of Anterior 

 Pituitary Function." (Address of president of the Pacific Division.) 



Nevil V. Sidgwick, Lincoln College, Oxford, England. "Molecules." 

 (Sixth Hector Maiben lecture.) Science 86: 335-340. 



A. E. Douglass, University of Arizona. "Tree-rings and Chronology." 

 (Eighth John Wesley Powell lecture.) 



Symposia 



"Astrophysical Problems of the Ionosphere" (4 papers). American 

 Physical Society, Section on Astronomy and Astronomical Society of the 

 Pacific. 



"Rocky Mountain Geomorphology" (8 papers). Section on Geology and 

 Geography. 



