ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 
AFFILIATED SOCIETIES 
Tuesday, March 20. The Historical Society. 
Tuesday, March 20. The Anthropological Society. 
’ Wednesday, March 21. The Society of Engineers. 
Saturday, March 24. The Philosophical Society. 
Wednesday, March 28. The Geological Society. 
Saturday, March 31. The Biological Society. 
Tuesday, April 3. The Botanical Society. 
PROGRAMS ANNOUNCED SINCE THE PRECEDING ISSUE OF THE JOURNAL 
Thursday, February 1. The Entomological Society, at the National Museum, at 8 p.m 
Program: E.G. Smyta: A trip into Mexico for parasites of the bean leaf beetle 
A. C. Baker: 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. McCotuum: 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. Litttenaues: New researches to lighten the labor of navigators in 
jinding geographical position from observations of celestial bodies (illustrated). C. 
V. Hopason: 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 Rerves: Geological structure of the Bearpaw mountains (illus- 
trated). W.T. Tuom: Origin of the structural features of Montana and Wyoming 
(illustrated). 
Thursday, February 15. The Washington Pay Cha) at the Cosmos Club, at 8.15 p.m. 
Program: W. D. Couiins: The industrial aspects of modern methods of water 
purification. 
