SCIENCE 



Friday, July 18, 1913 



CONTENTS 



The Belation of Forests in the Atlantic Plain 

 to the Hnmidity of the Central States and 

 Prairie Begion: Dk. Raphael Zon 63 



Lester Franh Ward: Dk. Arthxjr Holliok . 75 



German and Swiss University Statistics: Peo- 



FESSOK EUDOLPH TOMBO, Jb 77 



Contributions to General Geology: Dr. Geo. 

 Otis Smith 78 



Medical Besearch in Great Britain 79 



The Educational Fund Commission of Pitts- 

 iurgh 81 



The Bochester Meeting of the American Chem- 

 ical Society 81 



Scientific Notes and News 82 



University and Educational News 86 



Discussion and Correspondence: — 



Nomenclature in Paleontology: Dr. W. D. 

 Matthew. Mendelian Factors: G. N. Col- 

 lins. Sivedenborg : Andrew H. Ward. A 

 New Variety of Juglans californica Wat- 

 son : E. B. Babcock 87 



Scientific Books: — 



Becent Works on Mathematics: Professor 

 Cassius J. Keyser. Lloijd Morgan's In- 

 stinct and Experience: Professor E. M. 

 Yerkes. Cammidge on Glycosuria: Pro- 

 fessor J. J. E. MACLEOD 90 



Special Articles: — 



The Prevalence of Bacillus radicicola in 

 Soil: Dr. Karl F. Kellerman, L. T. Leon- 

 ard. Some Effects of Sunlight on the Star- 

 fish : Professor Hansford MacCdrdt ... 95 



TEE BELATION OF FOBESTS IN THE 



ATLANTIC PLAIN TO THE HUMIDITY 



OF THE CENTBAL STATES AND 



PBAIBIE BEGION 



MSS. intended for publication and books, etc., intended for 

 review should be aent to Professor J. McKeen Cattell, Qa 

 en-Hudson, N. Y. 



INTRODUCTION 



Many of the dreams or presentiments of 

 the early scientists are now coming true 

 every day. The dreams of the alchemists 

 are now almost within the realization of 

 modern chemistry. The gropings of the 

 early biologists are almost within reach of 

 present-day experimental embryology, and 

 so on practically in every science; at first 

 a presentiment, "a hunch," which can not 

 be substantiated by any scientific facts. 

 This, later, with the accumulation of more 

 accurate observations is often entii'ely de- 

 nied or minimized, only to reappear again, 

 not as a presentiment any more, but as a 

 scientifically established fact. 



From the earliest times there existed 

 among laymen, and even scientists, a belief 

 that forests exercised an influence upon the 

 climate of entire countries. With the in- 

 troduction of accurate methods of meteoro- 

 logical observations, this popular concep- 

 tion has seemingly been greatly discredited. 

 All that most of the meteorologists were 

 willing to admit was that forests have a 

 local influence upon climate, extending 

 only over the territory actually occupied 

 by them. Within recent years, just when 

 this view seemed to be completely disposed 

 of, many new facts came up independently 

 in different countries, which point strongly 

 to the possibility of the forest exerting a 

 potent influence upon the humidity of re- 

 gions lying far away from it. I shall at- 

 tempt to consider in the light of these new 

 facts the conditions prevailing in the east- 

 ern part of the United States, and to es- 



