ANNOUNCEMENTS OF MEETINGS OF THE ACADEMY AND 



AFFILIATED SOCIETIES 



Tuesday, April 5. The Botanical Society, at the Cosmos Club, at 8 p.m. 



Wednesday, April G. The Society of Engineers. 



Thursday, April 7. The Entomological Society, at the National Museum, 

 at 8 p.m. 



Saturday, April 9. The Philosophical Society, at the Cosmos Club, at 8.15 

 p.m. Program: 



L. H. Adams: The heating of substances by expansion. 



W. P. White: Specific and latent heats of nickel and monel metal. 



C. H. Meyers and E. F. Mtjei^LER: Mollier diagrams. 



Tuesday, April 12. The Institute of Electrical Engineers. 



Wednesday, April 13. The Geological Society, at the Cosmos Club, 8 p.m. 

 Program : 



G. O. Smith: Scientific by-products of applied geology. 



David White: The structure of oil shales (Presidential address). 



Thursday, April 14. The Chemical Society, at the Cosmos Club, 



Saturday, April 16. The Biological Society, at the Cosmos Club. 



PROGRAMS ANNOUNCED SINCE THE PRECEDING ISSUE OF THE JOURNALi 



Tuesday, March 8. The Institute of Electrical Engineers, at the Cosmos Club, at 8.15 

 p.m. Program: P. A. Meyer: Industrial electric heating. 



Wednesday, March 9. The Geological Society, at the Cosmos Club, at 8 p.m. Program: 

 G. R. Mansfield: Igneous geology of southeastern Idaho. A. I. Jonas and E. Buss 

 Knopf: Stratigraphy of the nietamorphic rocMs of southeastern Pennsylvania and 

 Maryland. O. E. Meinzer: A map of Pleistocene lakes in the Basin-and- Range 

 Province and its interpretation. 



Wednesday, March 16. The Society of Engineers, at the Cosmos Club, at 8.15 p.m. 

 Program: John S. Conway: Radio fog signals, 



Saturday, March 19. The Biological Society, at the Cosmos Club, at 8 p.m. Program: 

 F. H. Knowlton: Flora of some newly discovered lake beds of southern Colorado. 

 H. C. Oberholser: The breeding waterfowl of the Great Plains region. 



Tuesday, March 22. The Anthropological Society, at the National Museum, at 4.45 

 p.m. Program: G.N.Collins: Origin and early distribution of maize. 



Thursday, March 24. The Society of Foresters, at the Cosmos Club, at 8 p.m. Program : 

 R. S. Kellogg : The pulp-wood supply and the paper industry. 



Friday, March 25. The Chemical Society, at the Interior Department, at 8 p.m. Pro- 

 gram: C. R. De Long: Chemical industry from the tariff standpoint. F. L. Hess: 

 The tariff on certain minerals used in chemical industries. 



vSaturday, Mach 26. The Philosophical Society, at the Cosmos Club, at 8.15 p.m. Pro- 

 gram: O. S. Adams: Authalic latitude, a cartographic expedient. E. A. Eckhardt 

 and J. C. Karcher: A chronographic recorder of radio time signals. 

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



