The Popular Science Monthly 



Entered in the Post Office in Lancaster, Pa., as second-class matter. 



CONTENT8 OF THE JUNE NUMBER 



The Measurement of Natural Selection. Dr. J. Arthur 



Harris. 

 The Kelation of Biology to Agriculture. Professor F. 



E. Marshall. 

 Is Euclid's Geometry Merely a Theory. Dr. Edward 



Moffat Weybr. 

 The Underlying Facts of Science. Alfred Sang. 

 The Vienna Institution for Experimental Biology. 



Prof. Charles Lincoln Edwards. 

 The Relation of the Manual' Arts to Health. Professor 



Lewis M. Terman. 

 What Masterpieces of Greek Sculpture -were known to 



the Men of the Renaissance? Dr. Edward S. 



Holden. 

 The Progress of Science : Meetings of Scientific Soci- 

 eties; The Centenary of the Birth of John William 



Draper ; Henry Nathaniel Bowditch ; Scientific 



Items. 

 Index to Volume LXXVHL. 



CONTENTS OF THE JULY NUMBER 



Pasteur, a Study in Greatness. Professor Fernando 



Wood Martin. 

 Concealing Coloration. Abbott H. Thaykr. 

 Expansion of the Usefulness of Natural History 



Museums. Professor Thomas H. Montgomery, Jr. 

 The History and Varieties of Human Speech. Dr. 



Edward Sapir, 

 University Standards and Student Activities. Orris 



Leslie Elliott. 

 The Psychology of Mental Deficiency. Dr. Bird T. 



Baldwin. 

 Jacobus Henricus van 't Hofl. Professor Harry C. 



Jones. 

 The Progress of Science: The Amherst Idea; The 



Catskill Aqueduct ; Scientific Items. 



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