Vol. LXXVIII, No. 6 JUNE, 1911 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. JttC-KE^rX CJTJELL 



CONTENTS 

 The Measurement of Natural Selection. Dr. J. Arthur Haeris " . .521 

 The Relation of Biology to Agriculture. Professor F. R. Marshall . 539 

 Is Euclid's Geometry Merely a Theory. Dr. Edward Moffat Weyee 554= 



The Underlying Facts of Science. Alfred Sang 564 



The Vienna Institution for Experimental Biology. Prof. Charles Lin- 

 coln Edwabds 584 



The Relation of the Manual Arts to Health. Professor Lewis M. Terman 602 



What Masterpieces of Greek Sculpture were known to the Men of the 



Renaissance? Dr. Edward S. Holden 610 



The Progress of Science : 



Meetings of Scientific) Societies ; The Centenary of the Birth of John William 

 Draper ; Henry Nathaniel Bowditch ; Soientifio Items . . . . .615 



Index to Volume LXXVIII 621 



. THE SCIENCE PRESS 



w ' LANCASTER, PA. GARRISON, N. Y. 



NEW YOKE : Sub-Station 84 

 Single Number, 30 Cents Yearly Subscription, $3.00 



Copymght, 1910, by THE SCIENCE PRESS 



