SCIENCE 



A WEEKLY JOURNAL DEVOTED TO THE ADVANCEMENT OF SCIENCE, PUBLISHING THE 



OFFICIAL NOTICES AND PROCEEDINGS OF THE AMERICAN ASSOCIATION 



FOR THE ADVANCEMENT OF SCIENCE. 



Friday, February 2, 1906. 



CONTENTS. 



The American Association for the Advance- 

 ment of Science: — 



The Partition of Energy: Professor W. F. 

 Magib 161 



Transportation and Comhination : The 

 Hon. Martin A. Knapp 178 



Scientific Books: — 



Sutton's Volumetric Analysis, Olsen's Quan- 

 titative Chemical Analysis: F. L 184 



Scientific Journals and Articles 185 



Societies and Academies: — 



The American Mycological Society: C. L. 

 Shear. The Biological Society of Wash- 

 ington: Dr. M. C. Marsh. The Wellesley 

 College Science Club: Grace E. Davis. 

 The Berkeley Folk-lore Club: Professor 

 A. L. Kroebee. The Chemical Society of 

 St. Louis: C. J. Boegmater 186 



Discussion and Correspondence: — 

 Please Excuse the Kelep : O. F. Cook 187 



Special Articles : — 



A New Theory of Sex-production: Pro- 

 fessor E. B. Wilson 189 



Astronomical Notes: — 



The Figure of the Sun; Relation between 

 the Motion in the Line of Sight and the 

 Variation in Brightness of Variable Stars: 

 Professor S. I. Bailey ' 191 



Current Notes on Meteorology : — 

 Brief Comment on Recent Articles: Pro- 

 fessor R. DeC, Ward 192 



Notes on the History of Natural Science: — 

 Hippocratean Fishes; The Real Unicorn: 

 Dr. C. E,. Eastman 194 



Robert Boicne Warder 195 



Scientific Notes and Neivs. .'. 197 



University and Educational News 200 



MSS. inteuded for publloatiou aud books, etc., Intended 

 lor review should be sent to the Editor of Science, Garri . 

 BOn-on-HudBon, N. Y. 



THE PARTITION OF ENERGY.^ 

 As I rise in this place to address you, 

 I recall a dear friend, who stood before 

 you in a similar position three years ago, 

 and whose premature death has dealt so 

 severe a blow to this association and to the 

 science represented in this section. The 

 name of DeWitt Bristol Brace will always 

 be honorably remembered in the history of 

 physics. While a student at Boston Uni- 

 versity, he began the study of that science, 

 and after his graduation in 1881, he pro- 

 ceeded to Johns Hopkins University to 

 devote himself exclusively to it. After two 

 years of study there, he went to Berlin, 

 where he heard the lectures of Kirchhoff, 

 and worked in the physical laboratory 

 under the direction of Helmholtz. It was 

 in Berlin that he definitely settled the 

 whole course of his subsequent scientific 

 career, by insisting on taking up, as his 

 subject of research, the difficult question 

 of the exact mode of transmission of a 

 polarized ray which is undergoing magnetic 

 rotation. This question was out of the line 

 along which the work of the director and 

 of his students was proceeding at that time, 

 and Brace not only set the problem for 

 himself, but owed entirely to his own in- 

 .ventive genius the brilliant method which 

 he proposed for its solution. I remember 

 how difficult it was for Brace to convince 

 our director of the possibility of transmit- 

 ting the ordinary and extraordinary beams 

 in a common direction in a crystal of Ice- 



' Address of the vice-president and chairman of 

 Section B — Pliysics, American Association for the 

 Advancement of Science, New Orleans, 1905. 



