Established in iSj2, 



THE POPULAR SCIENCE 



MONTHLY 



3 DOLLARS 

 A YEAR 



25 CENTS 

 A NUMBER 



Edited by 

 Professor J. McKeerv Cattell 



The Popular Science Monthly for March opens with an article by Professor Simon Newcomb, 

 U. S. N., on the motions ot the stars and their distribution through space. This is the last of a series 

 of "Chapters on the Stars," by one of the greatest of living astronomers, who not only speaks with 

 the highest authority, but is able to present the progress of astronomical science in a clear and read- 

 able form. This is followed by a series of interesting and timelv articles. Mr. Havelock Ellis, 

 Editor of the "Contemporary Science Series," treats the nationality, race, and social class of the most 

 eminent British men of genius, and Professor R. H. Thurston, Director of Sibley College, Cornell 

 University, contributes an article describing the development of modern ideas regarding the persistence 

 of energy. Dr. D. S. Sargent, Director of the Hemenwav Gymnasium of Harvard University, 



describes measurements made by him on a thousand Cuban teachers and compares their type with 

 that of the American student. Hudson Maxim, in an illustrated article, explains his experiments on 

 high explosives and the properties of "maximite." Professor Edwin G. Dexter, of the University 

 ot Illinois, gives extensive statistics that he has collected, showing the influence of the weather on 

 suicide. Dr. H. W. Fairbanks, in another beautifully illustrated article, describes one of the most 

 interesting and least known geological regions of the United States — Pyramid Lake. Professor E. A. 

 Andrews, of Johns Hopkins University, gives some curious facts in regard to frogs that care for their 

 young, and Professor William H. Hobbs, of the University of Wisconsin, explains the advantages 

 ot a bicvcle for the geologist. Professor G. N. I. Stewart reviews in a special article recent 



progress in physiology, and there are, as usual, special departments devoted to scientific literature, 

 correspondence, and the progress of science. 



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