RECENT WILEY BOOKS. 



MANUAL OF THE CHEMICAL ANALYSIS OF 



ROCKS. 



Third Edition, Revised and Enlarged. 



By HENRY S. WASHINGTON", Ph.D. 



A thoroughly revised and considerably enlarged book. New methods that 

 have been tried and proved of undoubted superiority have been introduced, 

 but in the main well-known and oft- tried, reliable methods have been 

 adhered too. 



xii + 271 pages. . 6 by 9. Cloth, $2.50 net. 



CHEMICAL CALCULATION TABLES. 



For Laboratory Use. 



Second Edition, Revised. With- a Double Thumb-index for Five-Place 

 Logarithms. 



By HORACE L. WELLS, Professor of Analytical Chemistry and Metallurgy 

 in the Sheffield Scientific School of Tale University. 



In this edition a new table for facilitating the calculation of percentage com- 

 positions of organic compounds has been added, which makes the book more 

 compact and more convenient for its chief use. Note its chapter headings: 



Atomic Weights. Gravimetric Factors. Formula- Weights. Indirect Analyses. 

 Reduction of Gas- Volumes to 0° and 760 mm. Calculation of Percentage of 

 Nitrogen from the Gas- Volumes. Barometer Corrections for Temperature. 

 Multiples for Organic Compounds. Constants for Molecular- Weight Deter- 

 minations. Weights and Measures. Logarithms of Numbers. 



v + 43 pages. 6± by 9£. Cloth, $1.35 net. 



Send for Free Examination copies. 



JOHN WILEY & SONS, Inc. 



Dept. B — 432 Fourth Avenue, New York 



London: Chapman & Hall, Ltd. 



Montreal, Can.: 

 Renouf Publishing Co. 



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 Philippine Education Co. 



