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ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 
AFFILIATED SOCIETIES 
_ Thursday, April 5. The Entomological Society, 
Saturday, April 7. The Philosophical Society. 
Tuesday, April 10. The Electrical Engineers. 
- Wednesday, April 11. The Geological Society. - 
Thursday, April 12. The Chemieal Society. 
Saturday, April 14. The Biological Society. 
Tuesday, April 17. The Historical Society. 
Tuesday, April 17. The Anthropological Society. 
Wednesday, April 18. The Engineering 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. Smyta: A trip into Mexico for parasites of the bean leaf beetle. 
A. C. Baxnr: 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. McCoiuum: 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. Lirrienaues: 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.- 
‘Wyrcxorr: (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 Rurves: 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. 
