SCIEN 



A WeeRIy Journal devoted to the Advancement 

 of Science, publishing the official notices and 

 proceedings of the American Association for the 

 Advancement of Science, edited by J. McKeen 

 Cattell and published every Friday by 



THE SCIENCE PRESS 



I I Liberty St., Utica, N. Y. Garrison, N. Y. 



New York City: Grand Central Terminal 



Annual Subscription, $6.00 Single Copies, 15 Cts. 



Entered as second-class matter January 21, 1922, at the 

 Post Office at Utica, N. Y., Under the Act of March 3, 1879. 



Vol. LVI September 15, 1922 No. 1446 



CXDNTENTS 



Discovery of Cretaceous and Older Tertiary 

 Strata in Mongolia: Dr. Henry Fairfield 

 OSBORN 291 



The Feeding Power of Plants: Dr. E. Truog 294 



The Teaching of Evolution: Professor E. L. 

 Pickett - 298 



Scientific Events: 



Vital Statistics of German Cities; The Med- 

 wood Trees of California; Ceramic Day; 

 The Geological Society of America; The 

 Journal of Physical Chemistry; Chemical 

 Prize established iy the Allied Chemical 

 and Dye Corporation; Menibers of the 

 American Medical Association and the 

 American Association for the Advancement 

 of Science 301 



Scientific Notes and News 305 



Uni/oersity and Educational Notes 307 



Discussion and Correspondence : 



The Zodiacal Light: The Honorable 

 Chase S. Osborn. The Mealy-hug called 

 Pseudococcus Bromeliw and other Coccids: 

 Professor T. D. A. Cockerell. The De- 

 termination of Fat in Cream: Professor 

 H. W. Gregory. Dr. Lipman's Laboratory 

 of Applied Psychology: Professor J. B. 

 Miner. Shipment of American Literature 

 to Russia: Eaphael Zon 308 



Quotation : 



Children and Museums 311 



Scientific Boohs: 



Green on the Coocidce of Ceylon: Profes- 

 sor G. F. Ferris 312 



Special Articles: 



Photoperiodism of Wheat: Dr. H. M. 

 Wanser. Improved Methods in Neic Infra- 

 red Absorption Study: Dr. Joseph W. 

 Ellis 313 



DISCOVERY OF CRETACEOUS AND 



OLDER TERTIARY STRATA 



IN MONGOLIAi 



The American Museum of Natural History 

 announces/ under date of May 3, 1922, that 

 strata of Cretaceous age, overlain by two dis- 

 tinct Tertiary formations, have been discovered 

 in the Gohi region of southeastern Mongolia. 



They were found on the outbound trip from 

 Kalgan to Urga at- a point about 260 miles 

 northwest of Kalgan. Strata of Cretaceous 

 age are wholly unknown in Eastern Asia, as 

 far as the writers of the present communica- 

 tion are aware, and because of the apparent 

 importance of the find, it was decided to leave 

 the geologists in camp at this place while the 

 rest of the party moved on. Accordingly 

 Messrs. Berkey, Granger and Morris spent a 

 week in additional inspection of the ground 

 and furnish the notes for this memorandum. 



Obretcheff, the Russian geologist, who gives 

 an account of a reconnaissance trip over this 

 same route from Ude to Kalgan, describes 

 sedimentary beds at many places, always I'e- 

 ferring to them as representatives of the Gobi 

 formation. His only age determination, how- 

 ever, was made on the basis of a few frag- 

 ments of Bhinoceros, found at the escarpment 

 five miles south of Iren. These remains were 

 judged by Eduard Suess, to whom they were 

 referred, to indicate an age not earlier than 

 the Miocene. The Tertiary age of the rest of 

 the occurrences mentioned by him seems to 

 have been taken for granted and apparently 

 that is in general correct, but it is evident that 

 the Gobi formation can not properly include 

 strata of both Tertiary and Cretaceous ages. 



1 Abstract: "Discovery of Cretaceous and 



Older Tertiary Strata in Mongolia, ' ' Walter 



Granger and Charles P. Berkey. American 



Museum Novitates, No. 42, 7 pp. 1 fig., August 

 7, 1922. 



