V^ 3 

 Vol. LXXXIII, No. 5 NOVEMBER, 1913 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. McKEEN CATTELL 



CONTENTS 



The History of Dietetics. Dr. John Benjamin Nichols . . .417 



Jewish Colonization in Palestine. O. F. Cook 428 



The National Zoological Garden. Dr. R. W. Shufeldt . . . 434 



The Discovery of Contact Electrification. Professor Fernando Sanford 441 

 The Application of the Physiology of Color Vision in Modern Art. 



Henry G. Keller and Professor J. J. R. Macleod . . . 450 

 The Petrified Forest of Mississippi. Professor Calvin S. Brown . . 466 

 Economic Factors in Eugenics. Dr. William Leland Holt . . 471 

 How the Problems of the Rural Schools are being met. Mary A. Grtjpe 484 

 The Increase of American Land Values. Dr. Scott Nearing . . 491 

 The Scientific Study of Child Development. Professor James Burt Miner 506 

 The Progress of Science : 



The Scientific Origin of Moving Pictures ; Legal Limitations of Marriage ; Soientifio 



Items ............. 514 



THE SCIENCE PRESS 



LANCASTER, PA. GARRISON, N. Y. 



NEW YORK: Stjb-Statiok 84 



Sesgle Humbeb, 30 Cents Ykart.t Subscription, $3.00 



it 



COPYKIGHT, 1912, BY THE SCIENCE PRESS 



