SCIENCE 



Friday, March 26, 1920 



CONTENTS 



Resum4 of Observations concerning the Solar 

 Eclipse of May S9, 1919, and the Einstein 

 Effect: Dr. L. A. Bauer 301 



Vrwty and Balance in the Zoology Course: 

 PROrEssoR A. Franklin Shull 312 



A Forerunner of Evolution: Dr. Maynard 

 Shipley 315 



Scientific Events: — 



The Preservation of Natural Conditions ; 

 The National Committee on Mathematical 

 Requirements; The New Yorlc State College 

 of Agriculture and the New Yorlc State Ex- 

 periment Station 316 



Scientific Notes and News 318 



University and Educational News 319 



Discussion and Correspondence: — 



Modern Interpretation of Differentials: 

 Professor Edward V. Huntington. Weight 

 and Centripetal Acceleration: Professor 

 Burt L. Newkirk. The Situation of Sci- 

 entific Men in Russia: Dr. S. Morgdlis. 

 Russian and American Scientific Men: A 

 Member of the Exploited Classes .... 320 



Nitrogen from the Air and the British Gov- 

 ernment 323 



Notes on Meteorology and Climatology : — 

 Rainfall (and Snowfall) of the United 

 States: Dr. Charles P. Brooks 324 



Special Articles: — 



Intersexes in Drosophila simulans: De. A. 



H. Stuetevant 325 



The Illinois State Academy of Science : Dr. J. 

 L. Pricer 327 



MSS. intended for publication and books, etc., intended for 

 review abould be sent to Tbe Editor of Science, Garrison-on- 

 Hudson, N. Y. 



RESUME OF OBSERVATIONS CON- 

 CERNING THE SOLAR ECLIPSE 

 OF MAY 29, 1919, AND THE 

 EINSTEIN EFFECTi 



1. A total eclipse of the sun is of more than 

 passing interest, not merely to the astronomer 

 but also to the geophysicist. Indeed, by 

 reason of the supposed verification of the so- 

 called Einstein effect during the solar eclipse 

 of May 29, 1919, which, in consequence, may 

 make that eclipse the most famous of aU 

 eclipses observed thus far, an eclipse of the 

 sun has become of profound interest also to 

 the physicist, to the mathematician, and to 

 the philosopher, in general. 



In the following brief account of the chief 

 phenomena observed during the solar eclipse 

 of May 29, 1919, the path of totality for 

 which is shown in Fig. 1, the attempt will be 

 made to bring out succinctly the various 

 points of interest to men of science. 



2. To give a personal touch let me first 

 briefly state the results of my own expedition 

 to Cape Palmas, Liberia, where totality was 

 longer (6 minutes and 33 seconds) than at 

 any other accessible station, where the sky 

 was comparatively clear, contrary to all good 

 meteorological predictions, and where totality 



1 Abstract of papers presented before the Philo- 

 sophieal Society of Washington (October 11, 1919 

 and January 3, 1920), Koyal Astronomical Society 

 of Canada, Toronto (December 2, 1919), Ameri- 

 can Academy of Arts and Sciences, Boston (Jan- 

 uary 14, 1920), American Philosophical Society, 

 Philad'elpihia (February 6, 1920) and American 

 Physical Society (New York, February 28). Also 

 basis of public lectures delivered at the follow- 

 ing universities: Toronto (December 2, 1919), Col- 

 lege of the City of New York (December 4, 1919), 

 Johns Hopkins (January 12), Yale (January 13), 

 Brown (January 15), Columbia (January 16), 

 Swarthmore (February 7) and Middletown 

 Scientific Association of Wesleyan University 

 (March 9). 



