

^ 



?y 



SCIENCE 



A WEEKLY JOURNAL 



DEVOTED TO THE ADVANCEMENT OF SCIENCE. 



Editoeial Committee : S. Newcomb, Mathematics ; E. S. Woodwaed, Mechanics ; E. C. Pickeeing, 



Astronomy; T. C. Mendenhall, Physics; E. H. Thueston, Engineering; lEA Ebmsen, Chemistry; 



J. Le Conte, Geology; W. M. Davis, Physiography; O. C. Maesh, Paleontology; "W. K. 



Beooks, C. Haet Meeeiam, Zoology ; S. H. Scuddee, Entomology ; N. L. Beittok, 



Botany; Heney F. Osboen, General Biology; H. P. Bowditch, Physiology; 



J. S. Billings, Hygiene ; J. JIcKeen Cattell, Psychology ; 



Daniel G. Beinton, J. W. Powell, Anthropology ; 



G. Beown Goode, Scientific Organization. 



IJEW SERIES. VOLUME III. 

 JANUAKY-JUNE, 1896. 



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NEW YOEK. 



THE MACMILLAN COMPANY. 



1896 



