OFFICERS OF THE ACADEMY 



President: F. h. Ransome, Geological Survey. 



Corresponding Secretary: Robert B. Sosman, Geophysical Ivaboratory. 

 Recording Secretary: William R. Maxon, National Museum. 

 Treastirer: R. L. Faris, Coast and Geodetic Survey. 



ANNOUNCEMENT OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES^ 



Saturday, December 20. The Philosophical Society, at the Cosmos 

 Club, at 8.15 p.m. Program: 



J. Warren Smith: Predicting viininuim temperatures. (Illustrated.) 

 Charles F. Brooks: Clouds and their significance. (Illustrated.) 



Prospective members of the American Meteorological Society are invited to be 

 present. At the close of the program there will be a short business meeting to 

 discuss organization plans and to nominate officers for that society. 



Saturday, January 3. The Philosophical Society, at the Cosmos Club, 

 at 8.15 p.m. Program: 



Enoch Karrer: I. Diffusion of light in a searchlight beam. (Illustrated.) II. 

 The contrast sensibility of the eye at low illuminations. (Illustrated.) 



Fred. E. Wright: The contrast-sensibility of the eye as a factor' in the resolving 

 power of the microscope. 



Iv. A. Bauer: The solar eclipse of May 2Q, iQiQ, and the Einstein effect. (Illus- 

 trated.) 



Tuesday, January 6. The Anthropological Society, at Room 43, 

 New National Museum, at 4.45 p.m. 



Tuesday, January 6. The Botanical Society, at the Cosmos Club, 

 at 8.00 p.m. 



Wednesday, January 7. The Society of Engineers, at the Cosmos 

 Club, at 8.15 p.m. 



Thursday, January 8. The Chemical Society, at the Cosmos Club, 

 at 8.00 p.m. 



'The programs of the meetings of the affiliated societies will appear on this page if sent to the 

 Editors by the thirteenth and twenty-seventh of the month. 



