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. h. Faris, Coast and Geodetic Survey. 



ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES 



Tuesday, May 6. The Botanical Society. 



Wednesday, May 7. The Medical Society. 



Thursday, May 8. The Chemical Society. 



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



at 8.15 p.m. Program: 



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

 (Illustrated.) 30 min. 



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



Tuesday, May 13. Electrical Engineers. 



Wednesday, May 14. The Geological Society. 



Wednesday, May 14. The Medical Society. 



Thursday, May 15. The Washington Academy of Sciences. 



Saturday, May 17. The Biological Society. 



