ESTABLISHED IN 1872 



THE POPULAR SCIENCE 

 MONTHLY 



3 DOLLARS A YEAR 25 CENTS A NUMBER 



Edited by Professor J. McKeen Cattell 



THE POPUIvAR SCIENCE MONTHLY for March opens with an article by Pro- 

 fessor Simon Newcomb, U. S. N., on the motions of the stars and their dis- 

 tribution 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 author- 

 itj^ but is able to present the progress of astronomical science in a clear and readable 

 form. This is followed by a series of interesting and timely 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 Sible}' College, Cornell University, contributes an article describing the 

 development of modern ideas regarding the persistence of energy. Dr. D. S. Sargent, 

 Director of the Hemenway Gjannasium 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 "maxiniite." Profes.sor Edwin G. Dexter, of 

 the University of Illinois, gives extensive statistics that he has collected, showing the 

 influence of the weather on suicide. Dr. H. W. Fairbauks, in another beautifully illus- 

 trated article, describes one of the most interesting and least known geological regions 

 of the United States — Pyramid L,ake. Professor E. A. Andrews, of Johns Hopkins Uni- 

 versity, gives some curious facts in regard to frogs that care for their young, and Pro- 

 fessor William H. Hobbs, of the University of Wisconsin, explains the advantages of a 

 bicycle 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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