ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES' 



Saturday, January 26: The Biological Society, at the Cosmos Club, 



at 8 p. m. 

 Tuesday, January 29: The Anthropological Society, at the Public 



Library, at 8 p. m. Program: 



Dr. Leo Frachtenberg : Poland and the Polish question. 



Saturday, February 2: The Pliilosophical Society, at the Cosmos Club, 

 at 8.15 p. m. Program: 



W. S. Gorton: Investigations of X-ray protective materials. 

 P. T. Weeks : The efficiency of production of X-rays. 



1 The programs of the meetings of the affiliated Societies will appear on this page if sent to the 

 editors by the thirteenth and the twenty-seventh day of each month. 



