Economic Geology 

 of the United States 



WITH BRIEFER MENTION OF FOREIGN MINERAL PRODUCTS 



By RALPH S. TARR, B.S., F.G.S.A., 



Assistant Professor of Geology at Cornell University 



Second Edition Revised $3. 50 net 



COMMENTS 



" I am more than pleased with your new ' Economic Geology of the United 

 States.' An introduction to this subject, fully abreast of its recent progress, and 

 especially adapted to American students and readers, has been a desideratum. 

 The book is admirably suited for class use, and I shall adopt it as the text-book 

 for instruction in Economic Geology in Colorado College. It is essentially 

 accurate, while written in a pleasant and popular style, and is one of the few 

 books on practical geology that the general public is sure to pronounce readable. 

 The large share of attention given to non-metallic resources is an especially 

 valuable feature." FRANCIS W. CRAGIN, Professor of Geology, Mineralogy, and 

 Palaeontology at Colorado College. 



" I have examined Professor R. S. Tarr's ' Economic Geology ' with much 

 pleasure. It fills a felt want. It will be found not only very helpful to students 

 and teachers by furnishing the fundamental facts of the science, but it places 

 within easy reach of the business man, the capitalist, and the statesman, fresh, 

 reliable, and complete statistics of our national resources. The numerous tables 

 bringing out in an analytic way the comparative resources and productiveness of 

 our country and of different states, are a specially convenient and admirable 

 feature. The work is an interesting demonstration of the great public importance 

 of the science of geology." JAMES E. TODD, State Geologist, South Dakota. 



" It is one of those books that is valuable for what it omits, and for the concise 

 method of presenting its data. The American engineer has now the ability to 

 acquire the latest knowledge of the theories, locations, and statistics of the leading 

 American ore bodies at a glance. Were my course one of text-books, I should 

 certainly use it, and I have already called the attention of my students to its 

 value as a book of reference." EDWARD H. WILLIAMS, Professor of Mining, 

 Engineering, and Geology at Lehigh University. 



" I have taken time for a careful examination of the work ; and it gives me 

 pleasure to say that it is very satisfactory. Regarded simply as a general treatise 

 on Economic Geology, it is a distinct advance on anything that we had before ; 

 while in its relations to the Economic deposits of this country it is almost a new 

 creation and certainly supplies a want long and keenly felt by both teachers and 

 general students. Its appearance was most timely in my case, and my class in 

 Economic Geology are already using it as a text-book." WILLIAM O. CROSBY, 

 Assistant Professor of Structural and Economic Geology at the Massachusetts 

 Institute of Technology. 



THE MACMILLAN COMPANY 



Publishers 64-66 Fifth Avenue New York 



