246 



phology, etc., Brinckerhoff Theatre, Barnard Col- 

 lege, and of the Physiological Section, for papers on 

 the chemical aspects of physiology, 339 Barnard 

 College. 

 2 :oo p. m. Joint session of Section G, American Association for 

 Advancement of Science, with the Botanical Society 

 of America and the American Phytopathological So- 

 ciety. Address of the retiring vice-president of 

 Section G, Professor W, A. Setchell, and symposium 

 on relations of chemistry to botany. The speakers 

 will be W. J. V. Osterhout, on "Antagonism and 

 Permeability" and J. Arthur Harris, on "Physical 

 Chemistry in the Service of Phy togeography . ' ' The 

 symposium will be followed by a short business 

 meeting of Section G, Auditorium of Horace 

 Mann School, Broadway and 120th St. 

 9:00 p. m. Joint smoker at Columbia University Commons, to 

 which the members of the Botanical Society and 

 affiliated organizations are invited. 



Thursday, December 28. 



10:00 a. m. Simultaneous scientific sessions of the society at 

 large, for papers on genetics and evolution, Brinc- 

 kerhoff Theatre, and of the Physiological Section for 

 papers on the physical aspects of physiology, 339 

 Barnard College. 

 2 :oo p. m. Joint session of the Botanical Society of America 

 with the American Phytopathological Society, for 

 the reading of the annual invitation papers. The 

 speakers will be Wm. A. Murrill, Erwin F. Smith, 

 and W. A. Orton. Dr. Murrill will speak on his 

 systematic studies of the fleshy fungi, and will il- 

 lustrate his address with colored lantern slides. 

 Dr. Smith will speak of the important recent de- 

 velopments in his study of plant tumors, and Dr. 

 Orton will discuss the subject of plant breeding for 

 disease resistance. Both will use lantern slides. 

 Members of the organizations affiliated with either 



