ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES.^ 



Tuesday, May 4: The Botanical Society, at the Cosmos Club, at 8 p. m. 



„ Program : 

 K. F. Kellerman: The precipitation of calcium carbonate by bacteria. 20 



minutes. 

 N. E. Stevens: The genus Endothia. (Illustrated). 20 minutes. 

 L. A. Hawkins: Endothia pigments. (Illustrated). 20 minutes. 

 W. E. Safford: Identification of the teonanacatl or "sacred mushroom" of the 



Aztecs with the narcotic cactus, Lophophora, and an account of its ceremonial 



use in ancient and modern times. 10 minutes. 



Wednesday, May 5: The Medical Society, at the Medical Department 

 " of George Washington University, at 8 p. m. 



Thursday, May 6: The Entomological Society, at the Saengerbund 

 Hall, at 8 p. m. , 



Saturday, May 8: The Philosophical Society, at the Bureau of Stand- 

 ards, at 8.15 p. m. 



E. F. NoRTHRtJP, of Princeton University: Some physical properties of matter at 

 high temperatures. (Illustrated). 



Wednesday, May 12 : The Geological Societj^ at the Cosmos Club, at 



8 p. m. 

 R. C. Wells: The solubilily of magnesium carbonate in natural waters. 15 



minutes. 

 W. H. Fry: The weathering stability- of minerals as illustrated in soils and soiU 



like materials. 20 minutes. 

 G. R. Mansfield: Geology of the Fort Hall Indian reservation, Idaho. 30 



minutes. 



Wednesday, May 12: The Medical Society, at the Medical Department 

 of George Washington University, at 8 p. m. 



Thursday, May 13: The Chemical Society, at the Cosmos Club, at 8 



p. m. 

 R. R. Williams: The vitamincs and their relation to certain diseases. 



Saturday, May 15: The Biological Society, at the Cosmos Club, at 8 

 p. m. 



>The programs of the meetings of the affiliated socieiiea will appear oa this page if «ent to tbt 

 editors by the first and fifteenth days of each month. 



