Vol. LXXIX,No. 6. DECEMBER, 1911 



THE 



POPULAR SCIENCE 

 MONTHLY 



EDITED BY J. McKEEX CATTELL 



CONTENTS 



Science among the Chinese. Db. C. K. Edmunds 521 



Why do Certain Living Forms Produce Light. F. Alex. McDebmott . 532 



The "Water Relations of Desert Plants. Db. D. T. MacDougal . . 540 



Buffon and the Problem of Species. Pbofessob Abthtjb O. Lovejoy . 554 



Protozoan Germ Plasm. Pbofessob Gaby N. Calkins .... 568 



Adamas, or the Symmetries of Isometric Crystals. Pbofessob B. K. 



Emebson . 581 



The Lack of Printing in Antiquity. Fbedebic Dbew Bond . . . 584 



Is Vegetarianism Capable of World-wide Application? Pbofessob 



Alonzo Englebebt Taylob 587 



A Bugbear of Economics. Pbofessob Hebbebt Adolphus Milleb . 594 



The Germans at School. Pbofessob Hugo Munstebbebg . . . 602 



The Progress of Science : 



The Stationary Population of France ; The Zoological Laboratory of the University 



of Pennsylvania ; Scientific Items ........ 615 



Index to Volume LXXIX 621 



THE SCIENCE PRESS 



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Copyright, 1910, by THE SCIENCE PRESS 



