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A Weekly 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 



Single Copies, 15 Cts. Annual Subscription, S6.00 



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

 Office at Utica, N. Y.. under the Act of March 3, 1379. 



Vol. LV Maech 17, 1922 No. 1420 



Doctorates conferred in the Sciences ijy 

 American Universities in 19S1: Callie 

 Hull and Db. Clarence J. West 271 



The Organization of Knowledge: Dr. Fked- 

 ERicK L. Hoffman 279 



American Biological Stains compared with 

 those of Griibler: Dk. H. J. Conn 284 



Scientific Events: 



The Standardization of Industries; More 

 "Glass Flowers" at Harvard; The New 

 Building for Forestry at Yale University ; 

 The Washington Conference on Puhlio 

 Health 285 



Scientific Notes and News 288 



University and Educational Notes 291 



Discussion and Correspondence: 



Have the Streams of Long Island lieen 

 deflected by the Earth's [Rotation: Dr. 

 O. E. Jennings. Legislation to suppress 

 Truth: X. Ecological Investigations along 

 the Bed Biver: Dr. Carl Hartman. Atomic 

 Nuclei: Professor J. C. McLennan 291 



Notes on Meteorology and Climatology : 

 New Discussion of Temperatures in the 

 United States: Dr. C. LeEoy Meisinger.... 292 



Special Articles: 



The Production of Non-disjunction iy 

 X-rays: Dr. James "W. Mayor 295 



The American Association for the Advance- 

 ment of Science: 

 Beport of the Secretary-treasurer of the 

 , Pacific Division: Dr. W. W. Sargeant 297 



The American Astronomical Society: Pro- 

 fessor Joel Stebbins 298 



DOCTORATES CONFERRED IN THE 

 SCIENCES BY AMERICAN UNI- 

 VERSITIES IN 1921 



Through the generous cooperation of the 

 registrars of the various American tmiversities 

 granting doctorates in the sciences, the Re- 

 search Information Service of the National 

 Research Council is able to offer the following 

 compilation of doctorates granted during the 

 collegiate year 1920-1921. Through this same 

 cooperation statistics are now available for the 

 period 1916-1919. The information for these 

 three years has not been compiled heretofore 

 and therefore was lacking in the tables as 

 published last year (Science, 52, 478, 514). 

 These figures are of value as an indication of 

 the academic activity during the World War. 

 As would be expected, the number of doctor- 

 ates fell off as the size of the American army 

 increased (1917, 372; 1918, 293; 1919, 180). 

 This is a confirmation of the acknowledged fact 

 that the scientific men of the country played 

 an increasingly important part in the activities 

 of the army and navy. 



In 1921 there were 332 doctorates conferred 

 in the natural sciences by 32 institutions, as 

 compared with 323 by the same number of 

 institutions in 1920. (The figures reported in 

 1920 by institutions and by subjects have been 

 corrected in certain cases from later informa- 

 tion). It is interesting that the figures for 

 1917 should be so much higher than those for 

 any other year reported in the tables. How 

 long will it be before those figures are again 

 reached ? 



Marked changes in the order of institutions 

 are in the shift of Minnesota from nineteenth 

 place in 1920 to tenth place in 1921, and of 

 George Washington from tenth place in 1920 

 to twenty-sixth place in 1921. Comparisons of 

 this kind are of uncertain significance because 

 the number of degrees granted by an institu- 

 tion during any collegiate year depends upon 

 many factors. 



