ANNOUNCKMENTS OF MEETINGS OF THE ACADEMY AND 



AFFIUATED SOCIETIES 



Thursday, May 5. The Entomological Society, at the National Museum, at 

 8 p.m. 



Saturday, May 7. The Philosophical Society, at the Cosmos Club, at 8.15 

 p.m. Program : 



I. C. Gardner: Self-contained range finders and their errors. 

 I. G. Priest: Spectral distribution required to evoke the gray sensation. 



Tuesday, May 10. The Institute of Electrical Engineers, at the Cosmos 

 Club. 



Wednesday, May 11. The Geological Society, at the Cosmos Club, at 8 

 p.m. Program: 



B. I/. Johnson: The glacial launching of the Ft. Liscuni landslide, Alaska. 

 W; F. Foshag; Origin of the colemanite deposits of California. 

 E. T. Wherry: Relations of vegetation to geological formation. 



Thursday, May 12. The Chemical Society, at the Cosmos Club, at 8 p.m. 



Saturday, May 14. The Biological Society, at the Cosmos Club. 



Thursday, May 19. The Academy, at the Cosmos Club. 



OTHER ANNOUNCEMENTS 

 Saturday, May 7. The Maryland- Virginia-District of Columbia Section of 

 the Mathematical Association of America, at the drafting hall of the Capi- 

 tol, S. Capitol and B Streets SE., at 11 a.m. and 2 p.m. 



FROGRAMS ANNOUNCED SINCE THE PRECEDING ISSUE OF THE JOURNAL^ 



Tuesday, April 12^ The Institute of Electrical Engineers, at the Cosmos Club, at 8.15 

 p.m. Program: J. Lester Woodbridge: Storage batteries; their characteristics and 

 applications. 



Thursday, April 14. The Chemical Society, at the Cosmos Club, at 8 p.m. Program: 

 Edgar F. Smith : A glance at the early organic chemistry of the United States. 



Saturday, April 16. The Biological Society, at the Cosmos Club, at 8 p.m. Program: 

 E. W. Nelson: Alaska and the reindeer industry. F. C. Lincoln: The Fall mi- 

 gration of ducks from Lake Scugog, Ontario. 



Tuesday, April 19. The Anthropological Society, at the National Museum, at 4.45 p.m. 

 Program: C. Hart Merriam: The Indians of the Yosemite region, California. 

 Annual meeting and election of officers. 



Wednesday, April 20. The Society of Engineers, at the Cosmos Club, at 8.15 p.m. Pro- 

 gram: L. W. Wallace: The Federated American Engineering Societies. John L. 

 Harper: Niagara Falls and its utilization. 



Thursday, April 21. The Academy, at the Cosmos Club, at 8.15 p.m. Program: C. G. 

 Abbot: llie solar constant observing stations of the Smithsonian Institution. 



» Received too late for publication before the date of the meeting. 



