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 



Tuesday, March 4. The Anthropological Society, at the Army 



Medical Museum, at 4.15 p.m. Program: 

 J.Walter Fewkes: Archeology of the Mexican oilfield. (Illustrated.) 



Tuesday, March 4. The Botanical Society, at the Cosmos Club, 



at 8.00 p.m. Program: 

 A. S. Hitchcock: A botanical trip to the Hawaiian Islands. (Illustrated.) 35 min. 

 W. E. Sakford: Vegetation of Paradise Key and the surrounding Everglades. 



(illustrated.) 35 min. 



Wednesday, March 5. The Society of Engineers. 



Wednesday, March 5. The Medical Society, at 8.00 p.m. 



Thursday, March 6. The Entomological Society. 

 Saturday, March 8. The Biological Society, at the Cosmos Club, at 

 8.00 p.m. Program: 



A Symposium on the subject : The kind of differences that distinguish a species 

 from a subdivision of a species. Mammals, N. HoIvLister; birds, H. C. ObER- 

 hoIvSEr; fishes, W. C. Kendall; insects, A. N. Caudell; mollusks, P. Bartsch; 

 botany, C. V. PipER, S. F. Blak3. 10 min. each. 



Wednesday, March 11. The Electrical Engineers. 



Thursday, March 12. The Geological Society, at the Cosmos Club, 



at 8.00 p.m. Program: 



F. E. Matthes: The graphic representation of topographic forms. 

 R..B. Sosman: Note on volcanic explosions. 



Thursday, March 12. The Medical Societ3^ 



Friday, March 13. The Chemical Society, at the Cosmos Club, at 



8.00 p.m. Program: 



Lieut. Col. Arthur B. Lamb, Chemical Warfare Service: Chemical protection 

 against poisonous gases. 



Saturday, March 15. Joint meeting of the Washington Academy of 

 Sciences and the Philosophical Society, at the Cosmos Club, at 



"8.15 p.m. Program: 

 Dr. H. D. Curtis, Lick Observatory: Modern theories of spiral nebulae. 



Tuesday, March 18. The Anthropological Society. 



