THE SEMI-CENTENARY ANNIVERSARY OF THE 

 NATIONAL ACADEMY OF SCIENCES 



The National Academy of Sciences will celebrate the 50th anniver- 

 sary of its foundation at the National Museum in Washington April 

 22-24 inclusive. The program will include the following addresses, to 

 which the members of the Washington Academy of Sciences and of its 

 affiliated societies are cordially invited. 



Tuesday, April 22, — Opening session, 11 a.m. Welcome by Presi- 

 dent Ira Remsen. 



The relation of science to higher edncatio7i in America: President 

 Arthur T. Hadley, of Yale. 



International cooperation in research: Prof. Arthur Schuster, Sec- 

 retary of the Royal Society. 



Afternoon session, 3 p.m. — 'The earth and sun as magnets: Dr. George 

 *E. Hale, Director of the Mount Wilson Solar Observatory. 



Wednesday, April 23, 10.30 a.m. — On the material basis of heredity: 

 Prof. Theodor Boveri of the University of Wurzburg. 



The structure of the universe: Prof. J. C. Kapteyn of the University 

 of Groningen. 



All addresses will be in English. 



240 



