ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES 1 



The two remaining lectures of the series on nutrition previously an- 

 nounced by the Washington Academy of Sciences will be given on Fri- 

 day afternoons at 4:45 o'clock in the auditorium of the new National 

 Museum (Tenth street entrance) as follows: 



April 21: Dr. E. B. Forbes, Chief, Department of Nutrition, Ohio Agricul- 

 tural Experiment Station : Investigations on the mineral metab- 

 olism of animals. 



April 28: Dr. Carl Voegtlin, U. S. Public Health Service, Washington: 

 The relation of the vitamines to nutrition in health and disease. 



Thursday, April 20: Special meeting of the Philosophical Society, at 

 the Cosmos Club, at 8.15 p. m. Program: 



Dr. R. A. Millikan, Professor of Physics in the Universisy of Chicago: On 

 some recent aspects of the radiation problem. 



Saturday, April 22: The Biological Society, at the Cosmos Club, at 8 

 p. m. 



Wednesday, April 26 : The Geological Society, at the Cosmos Club, at 

 8 p. m., jointly with the Washington Academy of Sciences. 



The program will consist of a symposium on limestone deposition. Papers will 

 be presented by Karl F. Kellerman, John Johnston, and H. E. Merwik. 



Saturday, April 29: The Philosophical Society, at the Cosmos Club, 

 at 8.15 p. m. 



The program will consist of a symposium on X-rays and crystal structure. 

 Papers will be given by C. W. Kanolt and F. E. Wright. 



Tuesday, May 2: The Botanical Society, at the Cosmos Club, at 8 

 p. m. 



1 The programs of the meetings of the affiliated socities will appear on this page if sent to the edi- 

 tora by the first and fifteenth days of each month. 



