464 Scientific Intelligence. 



W. M. Davis : Quandaries following from the theory of isostacy. 



E. B. Dole : Composition of American river waters. 



F. W. Clarke : A preliminary study of chemical denudation. 



George F. Becker : Denudation evidence in relation to the age of the 

 Earth. 



Franz Boas : The influence of environment on human types. 



A. G. Webster : A new method for the study of elastic hysteresis. 



A. A. Noyes : The ionization relations of poly-ionic salts. 



Theodore Gill : The structural characteristics and relations of the Apo- 

 dals. Eecent discoveries of the early history of the common eel. 



Ira Bemsen : Some studies in molecular rearrangement. 



R. G. Aitken : The number of double stars as a function of the separation 

 of the component. 



W. W. Campbell and Sebastian Albrecht : On the spectrum of Mars as 

 photographed with high dispersion. 



W. W. Campbell : Second catalogue of spectroscopic binary stars. 



2. OstwalcVs Klassiker der Exakten Wissenschaften. Leipzig, 

 1909 (Wilhelm Engelmann). — The following are the latest addi- 

 tions to the valuable series of scientific classics : 



Nr. 171. Tiber unendliche Reihen (1689-1704) ; von Jakob 

 Bernoulli. Aus dem Lateinischen tibersetzt und herausgegeben 

 von Dr. G. Kowalewski. Pp. 141, with 12 figures. 



Nr. 172. Abhandlungen Jean Key's, Doktors der Medizin. 

 Uber die Ursache der Gewichtszunahme von Zinn und Blei beim 

 Verkalken. Deutsch herausgegeben und mit Ammerkungen 

 versehen von Ernst Ichenhauser und Max Speter. Pp. 56, 

 with 2 figures. 



Nr. 173. Untersuchungen tiber die Affinitaten tiber Bildung 

 und Zersetzung der Ather ; von Berthelot und L. Peau de 

 Saint-Gilles. Annales de Chimie et de Physique (3), lxv, p. 

 385 ; lxvi, p. 5 ; lxviii, p. 225. tJbersetzt und herausgegeben 

 von Margarete und Albert Ladenburg. Pp. 242, with 2 

 tables. 



EMropismus oder die Physikalische Theorie des Lebens ; von Felix Auer- 

 bach. Pp. iv, 99. Leipzig (Wilhelm Engelmann), 1910. 



Obituary. 



Professor Alexander Agassiz of Harvard University, Cam- 

 bridge, Mass., died on March 27, in the seventy-fifth year of his 

 age ; a notice is deferred until a later number. 



Professor Robert Parr Whitfield, curator in the American 

 Museum of Natural History, New York, died on April 6, in his 

 eighty-second year ; a notice will be published later. 



Dr. Charles Reid Barnes, Professor of Plant Physiology in 

 the University of Chicago, died on February 24, at the age of 

 fifty-one years. 



Professor Samuel Ward Loper, curator of the museum of 

 Wesleyan University, died in March, in his seventy-fifth year. 

 While he published little in geology, he did much to further pale- 

 ontology in making extensive collections of fishes and plants from 

 the Connecticut Triassic and in the older Paleozoic formations of 

 Texas, Wyoming, and Nova Scotia. 



