142 The Fourth St. Louis Meeting 



Sciences, Genetics Society of America, Systematic Section of the Botanical 

 Society of America and the American Society of Naturalists. 



"Early Man in America with Particular Reference to the Southwestern 

 United States" (6 papers). Section on Zoological Sciences, American 

 Society of Naturalists, Botanical Society of America and Genetics Society 

 of America. 



"Orchard Sanitation" (3 papers). American Association of Economic 

 Entomologists. 



''Contemporary Investigation of Taxonomic Concepts" (4 papers). 

 Botanical Society of America and Genetics Society of America. 



"Light Relations of Plants" (4 papers). Botanical Society of America 

 and American Society of Plant Physiologists. 



"The Plant Geography of the Mississippi Valley" (3 papers). Section on 

 Zoological Sciences, General Section of Botanical Society of America, Amer- 

 ican Society of Naturalists and Genetics Society of America. 



"Antibiosis : the Antagonism toward Plant Pathogens by other Micro- 

 organisms" (3 papers). American Phytopathological Society. 



"Ecological Aspects of some recent Government Activities" (8 papers). 

 Ecological Society of America. 



"Study and Teaching of the History of Science" (4 papers). Section on 

 Historical and Philological Sciences and History of Science Society. 



"Early Science in the St. Louis Area" (8 papers). Section on Historical 

 and Philological Sciences, History of Science Society and Academy of 

 Science of St. Louis. 



"Sex Hormones" (11 papers). Section on Medical Sciences. 



"The Conservation of the Land" (4 papers). Section on Agriculture and 

 American Society of Agronomy. First paper : "The Conservation of our 

 Land Resources.-" Jacob G. Lipman. Science 83 : 65-69. 1936. 



"Maturation and Learning" (4 papers). Section on Education and Sec- 

 tion on Psychology. 



Announcement and Report of Meeting 



Preliminary Announcement of the Fourth St. Louis Meeting. Henry B. 

 Ward. Science 82: 499-510. 1935. 



Permanent Secretary's general report, including reports of secretaries of 

 sections and of participating societies. Henry B. Ward. Science 83: 111- 

 146. 1936. 



