ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 
AFFILIATED SOCIETIES 
Tuesday, March 6. The Botanical Society. 
Wednesday, March 7. The Society of Engineers. 
Thursday, March 8. The Chemical Society. 
Saturday, March 10. The Philosophical Society. 
Tuesday, March 13. The Electrical Engineers. 
Wednesday, March 14. The Geological Society. 
Thursday, March 15. The Acapremy. 
Saturday, March 17. The Biological Society. 
PROGRAMS ANNOUNCED SINCE THE PRECEDING ISSUE OF THE JOURNAL 
Thursday, February 1. The Entomological Society, at the National Museum, at8 p.m 
Program: E.G. Smytu: A irip into Mexico for parasites of the bean leaf beetle 
‘A. C. Baxer: A history of the study of plant lice. 
Thursday, February 8. The Chemical Society, at the Cosmos Club, at 8 p.m. 
Program: E. V. McCoitum: What has been learned about nutrition in a decade. 
Saturday, February 10. The, Philosophical Society, at the Cosmos Club, at 8 p.m. 
Program: G. W. Lirttenaues: New researches to lighten the labor of navigators in 
finding geographical position from observations of celestial bodies (illustrated). C. 
V. Hopeson: Precise measurement of distances on the earth (illustrated). R.W.G. 
Wrcxorr: (1) Atomic radii. (2) Crystal structures of the alums (illustrated). 
Wednesday, February 14. The Geological Society, at the Cosmos Club, at 8 p.m. 
Program: Frank ReEves: Geological structure of the Bearpaw mountains (illus- 
trated). W. T. THom: Origin of the structural features of Montana and Wyoming 
(illustrated). 
Thursday, February 15. The Washington Academy, at the Cosmos Club, at 8.15 p.m. 
Program: W. D. Couuins: The industrial aspects of modern methods of water 
purification. 
