

WORKS OF HEIMICH RIES. Ph.D. 



Pi'ofetsor of Economic Geology, Cornell University 



BUILDING STONES AND CLAY PRODUCTS. 



A Handbook for Architects. Gives the fundamentally import ant facts, 

 siii + 41") pages. C by 9. 59 plates, including full-page halftones and 

 maps, 20 figures iu tbe text. Cloth. §3.00 net. 



CLAYS : 



Their Occurrence, Properties, and Uses, With Especial Reference to 

 Those of the United States. Second Edition, Revised and Enlarged, 

 A comprehensive work on the subject, of value to geologists, chemists, 

 and others interested in clay and its applications. 



xix + 554 pages. 6 by 9. 112 figures, 44 plates. Cloth, $5.00 net. 



ECONOMIC GEOLOGY. 



Fourth Edition, Thoroughly Revised and Enlarged. 

 In this new edition there is included a description of the more important 

 Canadian mineral deposits. 



xviii + 856 pages. 6 by 9. 291 figures. Cloth, $4.00 net. 



By Heinrich Riks, Ph.D., and Henry Leighton, A.B. 



HISTORY OF THE CLAY-WORKING INDUSTRY IN THE 

 UNITED STATES. 



A discussion of the History of the industry, by products, followed by 

 a discussion by States. 



ix + 270 pages. 6 by 9. Illustrated. Cloth, $2.50 net. 



By Heinrich Ries, Ph.D., and Thomas L. Watson, Ph.D. 

 ENGINEERING GEOLOGY. 



Second Edition, Enlarged. Total Issue, 6,000. Emphasizes the prac- 

 tical application of the topics treated to engineering work. 

 xxvii + 722 pages. 6 bv 9. 249 figures in the text, and 104 plates, com- 

 prising 175 figures. Cloth, §4.00 net. 



These books will be sent free for examination, no cash in advance, to 

 members of national technical societies. If you are not a member of any 

 society you can supply a reference or state your position. At the end of 10 

 days you are to remit the price of the books, or return them, postpaid. 



JOHN WILEY & SONS, Inc. 



Dept. B.— 432 Fourth Avenue, New York 



London : Chapman & Hall, Ltd. 

 Montreal, Can. : Manila, P. I.: 



Renouf Publishing Co. Philippine Education Co. 



AJS.-6-18 



