SCIENCE— ADVERTISEMENTS 



The Boreal Flora 



of the 



Sierra Nevada of California 



By FRANK JASON SMILEY 



423 pages, 7 plates. Paper, $5.00. Carriage 

 extra, weight 2% lbs. 



This book constitutes a working flora 

 of the high Sierra Nevada of California. 

 It has been the intent of the author to 

 present a list of all the plants of the 

 high Sierra with keys for their determi- 

 nation. He has also included descrip- 

 tions of the geology, topography, and 

 climate of the range. 



University of California Press 



Berkeley, California 



INDEX MEDICUS 



This publication is now issued in quarterly num- 

 bers and consists of the titles of books, pamphlets, 

 theses, contributions to cooperative works and 

 original articles in journals, transactions of medi- 

 cal and scientific societies, arranged under sub- 

 ject-headings in strictly alphabetical order, so that 

 each quarterly number indexes itself as to sub- 

 jects. The titles in certain languages, as Rus- 

 sian, Polish, Swedish, Danish, Finnish, Hungarian, 

 Bohemian, Roumanian, Dutch, Modern Greek, 

 and Japanese, are translated into English. A gen- 

 eral table of contents accompanies each number, 

 and a few months after the completion of eacli 

 volume an "Annual Index of Authors" will be 

 issued. The alphabetical arrangement of subjects 

 in eacli quarterly number is elaborately subdivided, 

 the classification closely resembling that of the In- 

 dex Catalogue of the Library of the Surgeon- 

 General's Office, U. S. Army. 



Each number of the Index Medicus presents tlie 

 literature of the quarter specified on its cover, time 

 being allowed for the arrival of foreign journals 

 and for assembling, classifying, and printing the 

 material presented. A volume comprises the issue 

 of the journal for a calendar year. 



Although the first series is out of print, all of the volumes of 

 the second series are availablo— Vols. I-VI (1903-1908) at the 

 original rate of S5.00 a volume, and Vols. VII-XVIII (1909-1920) 

 at the rate of 88.00 a volume. A special "War Supplement" 

 1914-1917, 265 pp„ S1,00, 



The subscription price, beginning with the Third Series in 1921, 

 payable in advance, is 38 a volume to all countries. AU com- 

 munications should be addressed: 



CARNEGIE INSTITUTION OF WASHINGTON 

 Washington, D. C. 



A New Book— WILEY BOOKS— New Editions 



FOR CHEMISTS 



Published January 2nd 



A SYSTEMATIC QUALITATIVE CHEMI- 

 CAL ANALYSIS — A Theoretical and 

 Practical Study o( Analytical Reactions 

 of the More Common Ions of Inorganic 

 Substances. 



By Geo. W. Sears, Ph.D., Associate Pro- 

 fessor of Chemistry in the University of 

 Nevada. 



Gives an entirely new and systematic meth- 

 od of analysis for acids; and trains tlie 

 student in the methods of analytical chem- 

 istry and in the principles underlying chemi- 

 cal reactions from the standpoint of the law 

 of mass action. With only a few necessary 

 exceptions, quantitative methods are used. 

 119 pages. 6 by 9. 4 figures. Cloth, $1.75. 



Sixth English Edition, Revised 

 TEXT-BOOK OF INORGANIC CHEM- 

 ISTRY 



By A. F. HoLLEMAN, Ph.D., LL.D,, F.R.A. 



Amst., in Cooperation with Hermon 



Charles Cooper. 



Due attention is paid in this new edition, 

 to discoveries which remained unpublished 

 during the war. 



528 pages. 6 by 9. 80 figures, folding 

 chart, and a table of Atomic Weights, of 

 1920. Cloth, $3,50. 



Fifth English Edition 

 QUALITATIVE ANALYSIS 



From the German text of the late Frederick 



P. Treadwell. Translated and Revised 



by William T. Hall, S.B. 



The entire text has been reset, thoroughly 

 revised and brought up to date. 



597 pages. 6 by 9. Illustrated. Cloth, 

 $4.50. 



COPIES SENT ON FREE EXAMINATION, ON REQUEST 



JOHN WILEY & SONS, Inc. 



432 FOURTH AVENUE 



NEW YORK 



