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. 



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 instruc- 

 tion 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 Paleo7itology 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 com- 

 plete 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, 



66 FIFTH AVENUE, NEW YORK, 



