SCIENCE-ADVERTISEMENTS 



New McGraw-Hill Books 



JOHANNSEN— (march. i914) 



Manual of Petrographic 

 Methods 



By ALBERT JOHANNSEN, Ph.D., Assistant 

 Professor of Petrology, The University of Chicago. 

 649 pages, 6x9, 765 illustrations. $6.00 (25s) net. 



There is no work in English which gives complete 

 information on modern petrographie-mioroscopic 

 methods. Dr. Johannsen has filled this gap with a 

 work of broad scope, requiring years of research and 

 labor. 



It is designed as a reference work for specialists 

 and a text book for advanced students. 



Send for full descriptive circular. 



LINDGREN— 



DALY (FEB. 1914) 



Igneous Rocks 



and Their Origin 



By REGINALD ALDWORTH DALY, Sturgis- 

 Hooper Professor of Geology, Chairman of the 

 Department of Geology, Harvard University. 

 563 pages, 6x9, 205 illustrations, $4.00 (17s) net, 



postpaid. 



For twenty years Dr. Daly has studied the earth 



problem as a whole, the views of other geologists, and 



formulated, developed and strengthened his own 



theory. 



He has embodied the results of hia study in a work 



for those who want either a general explanation or 



the significant facts. 



Mineral Deposits 



By WALDEMAR LINDGREN, Professor of Economic Geology, in charge of the Department of Geology, 



Massachusetts Institute of Technology, Geologist, United States Geological Survey. 



883 pages, 6x9, 257 illustrations, $5.00 (21s) net, postpaid. 



We call this book "epoch making" advisedly, because geologists generally agree],that it^marks a new era 

 in the current of opinion on ore deposits. 



From all over the world there have come most unusual words of praise for this book — ^the ripe fruit of long 

 study, experience and thought. 



STANSFIELD 



The Electric Furnace 



By ALFRED A. STANSFIELD, D.Sc, Bu-ks Pro- 

 fessor of Metallurgy Ln McGill University, Mon- 

 treal. 415 pages, 6x9, 155 illustrations, $4.00 

 (17s) net, postpaid. 



Prof. Stansfield brings down to date the important 

 facts relating to the theory and practise of the electric 

 furnace. 



The first. edition of his book has been a standard. 

 Since its publication in 1907, the development of the 

 electric furnace and the increase in its use have been 

 rapid. 



The present edition is twice the size of the first — a 

 growth made necessary both by the advance in the 

 industry and the demand for more detailed treat- 

 ment of the subject. 



MAHIN (JAN. 1914) 



Quantitative Analysis 



By EDWARD G. MAHIN, Associate Professor of 

 Chemistry in Purdue University. i^SlO pages, 119 

 illustrations, $3.00. 



A book that is broader in scope than the usual 

 text. It aims to produce in the mind of the student 

 a clear comprehension of the scientific development 

 of quantitative methods. It is especially valuable 

 to the commerical chemist since it devotes nearly 250 

 pages to the latest methods of "Analysis of In- 

 dustrial Products and Raw Materials." 



McGRAW-HILL BOOK COMPANY, Inc. 



BERLIN 239 West 39th Street, NEW YORK LONDON 



