OFFICERS OF THE ACADEMY 



President: F. L. Ransome, Geological Survey. 



Corresponding Secretary: Robert B. Sosman, Geophysical Laboratory. 

 Recording Secretary: William R. Maxon, National Museum. 

 Treasurer: R. L. Faris, Coast and Geodetic Survey. 



ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES 



Saturday, April 19. The Biological Society, at the Cosmos Club, at 

 8.00 p.m. 



Wednesday, April 23. The Medical Society. 



Wednesday, April 23. The Geological Society. 



Thursday, April 24. The Chemical Society. ^ 



Friday and Saturday, April 25 and 26. Ninety-seventh regular meet- 

 ing of the American Physical Society at the Bureau of Standards. 

 Exhibit of physical apparatus illustrating the application of physical 

 principles to the solution of war problems. 



Monday, April 28 The Board of Managers of the Washington 

 Academy of Sciences. 



Wednesday, April 30. The Medical Society. 



Xhursday, May i. The Entopiological Society. 



Saturday, May 3. The Biological Society. 



Saturday, May 10. The Philosophical Society, at the Cosmos Club, 

 at 8.15 p.m. Program: 



F. J. Schlink: On the nature of the' inherent variability of measuring instruments. 

 (Illustrated.) 30 min. 



R. L. Sanford: Magnetic analysis. (Illustrated.) 30 min. 



