A Weekly Journal devoted to the Advancement 

 of Sciencct 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 



1 I Liberty St., Utica, N. Y. GarrUon. N. Y. 



New York. City: Grand Central Terminal 



Annual Subscription, 86.00 Single Copies, IS Cts. 



Enteri!d m eecond-clasB matter January 21. 1922. at the Post 

 OBce at Utica. N. Y., under the Act of March 3. 1879. 



Vol. LV 



April 28, 1922 



No. 1426 



Individualism in Medical Education: Pro- 

 fessor A. C. Etcleshtmer 437 



Hydra in Lake Erie: Wilbert A. Clemens.... 445 

 A Mosquito Attractant: S. E. Crumb ,.. 446 



Scientific Events: 



Heinrich Suter ; The Calcutta School of 

 Tropical Medicine; Field Work of the 

 Museum of Zoology of the University of 

 Michigan; Branches of the Psychological 

 Corporation ; Geographical Meeting in New 

 York City ; Sigma Xi at McGill University ; 

 The Salt Lake City Meeting 447 



Scientific Netvs and Notes 451 



University and Educational Notes 454 



Discussion and Correspondence: 



The Writing of Popular Science : Dr. W. E. 

 Allen. Two New Western Weeds: S. F. 

 Blake. Cat-tail as a Feed: L. E. Ereu- 

 DENTHAL. Soil Shifting and Deposits: 

 J. A. Larsen 454 



Quotations : 



An International Language 457 



Special Articles: 



Atomic Structure: Dr. Maurice L. Hug- 

 gins. A Simple BultMing Hydrogen Elec- 

 trode: Dr. J. Roy Haag 459 



The Oklahoma Academy of Science: Dr. L. B. 

 Nice 461 



INDIVIDUALISM IN MEDICAL 

 EDUCATION! 



In Iiuman progress there are two funda- 

 mental processes whicli sometimes proceed 

 equally, but usually one or the other is dom- 

 inant, — these two processes are extension and 

 consolidation. In the birth and growth of na- 

 tions, there is lirst settlement in colonies due 

 to community of thought and action; this ex- 

 pansion is followed by a union; national ex- 

 pansion leads to international alliances; the 

 expansion of alliances leads to consolidation 

 into world leagues. In the growth of religions 

 many beliefs are unified by the Christian reli- 

 gion; then extension of doctrines leads to 

 innumerable sects, followed by attempts at 

 consolidation. In the more specialized fields 

 of activity the same processes ai'e observed. In 

 celestial physics the theory of gravitation co- 

 ordinated the scattered and divergent views; 

 then a period of differentiation, follovi-ed by 

 attempts at coordination in the theory of rela- 

 tivitj^ In the field of medical science there 

 are many illustrations of the same procedure. 

 Scattered observations on variations in the 

 blood, phlegm, and bile, during illness were 

 brought together in the humoral theory of dis- 

 ease; in like manner studies on bacteria were 

 unified in the germ theory. Studies on heredity 

 and environment found common expression in 

 the theory of evolution. In the past, medicine 

 was largely restricted to the diseases of man- 

 kind. At present she recognizes the intimate 

 relationships of the diseases of plants and ani- 

 mals to those of mankind. In the near future 

 she must take into consideration the diseases 

 of metals; ultimately her domain will extend 

 widely over both the organic and inorganic 

 world. In the growth of knowledge in all of 



1 An address delivered before the Association of 

 American Medical Colleges March 7, 1922. 



