ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES 1 



Saturday, October 21: The Biological Society, at the Cosmos Club, at 

 8 p. m. 



Wednesday, October 25: The Geological Society, at Cosmos Club, at 

 8 p. m. 



Wednesday, October 25: The Medical Society, at the Medical De- 

 partment of George Washington University, 1325 H Street N. W., at 

 8 p. m. 



Saturday, October 28 : The Philosophical Society, at the Cosmos Club, 

 at 8 p. m. Program: 



E. C. Crittenden, F. K. Richtmyer, and A. H. Taylor: A normal eye for the 

 photometry of lights of different colors. Illustrated. 30 minutes. 



W. W. Coblentz and W. B. Emerson: The relative sensibility of the average eye 

 to lights of different colors. Illustrated. 30 minutes. 



Wednesday, November 1 : The Medical Society, at the Medical De- 

 partment of George Washington University, 1325 H Street N. W., at 

 8 p. m. 



Thursday, November 2 : The Entomological Society, at the Saenger- 

 bund Hall, 8 p. m. 



Saturday, November 4: The Biological Society, at the Cosmos Club, 

 at 8 p. m. 



* The programs of the meetings of the affiliated societies will appear on this page If sent to the 

 editors by the first and fifteenth days of each month. 



