SCIENC 



New Series 

 Vol. L, No. 1293 



Friday, October 10, 1919 



SiSGLE Copies, 



Annual Subscbiption, $S 



OSTWALD— COLLOID CHEMISTRY 



2d Edition Revised. By Dr. Wolfgang Ostwald, Privatdozent, University of 

 Leipzig. Translated by Dr. Martin H. Fischer, Professor of Physiology, Uni- 

 versity of Cincinnati. With numerous additions by Emil Hatschek, Cass 

 Institute, London. With 63 Illustrations. 8vo. Cloth, $3.50 postpaid. 



" Colloid Chemistry has made great strides the last few years largely owing to the energy and 

 initiative of Wolfgang Ostwald the author of the most authoritative book on this complex sub- 

 ject, and an American translation of the third edition is now made by Dr. M. H. Fischer .... 

 It furnishes abundant references to the literature and should be in the hands of all who wish 

 to make a serious study of the subject." — The Lancet, London. 



PALLADI N- LI VINQSTON— PLANT PHYSIOLOGY 



Authorized English Edition based upon the German Translation of the 6th 

 and 7th Russian Editions. By V. I. Palladin, Professor in the University of 

 Petrograd. Edited by Burton E. Livingston, Ph.D., Professor of Plant 

 Physiology and Director of Laboratory of Plant Physiology, Johns Hopkins 

 University. With 173 Illustrations. 8vo. Cloth, $3.00 Postpaid. 



"The book renders available some results which the barrier of language has hitherto kept al- 

 most uakno9vn. Readers will be particularly glad to have an account of Palladin's work on 

 the respiration of dead plants and of his chromogen theory of respiration. All the citations of 

 literature have been verified and the form of reference rendered uniform." — Nature, London. 



SMITH— ELECTRO ANALYSIS 



6th Edition Revised. By Edgar P. Smith, M.A., Ph.D., Sc.D., Professor 

 of Chemistry, University of Pennsylvania. With 47 Illustrations. 12mo. 

 Cloth, $2.50 Postpaid. 



" Electroanalysis has taken an important place in chemical analysis because of the exactness 

 and rapidity of results obtained. Prof. Smith's book has been thoroughly revised to include 

 the improvements made during the last four years. It is a truly practical book and will be 

 read with much profit by those in charge of laboratories of electro-analysis." — Revue 

 Electeique, Paris, France. 



" It will always lemain one of the American classics." — Science. 



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