America's Leading Books on Geology. 



These books cover the subject from several different viewpoints, and are unsurpassed 

 both as to authorship and physical appearance. Examine them free at your office or 

 home. You have the privilege of returning them if not satisfied. 



TEXT=BOOK OF GEOLOGY.— -By the late Professor Louis V. Pirsson and Charles 

 Schuchert, Professor of Paleontology in Yale University and of Historical Geology in the 

 Sheffield Scientific School of Yale University. Complete in one volume. 1051 pages 6x9, 

 illus. Cloth, net $5.50. 



Part I. Physical Geology. By L. V. Pirsson. yii-f-444 pages, 6 by 9,311 figures in 

 text. Appendix, and folding colored map. Cloth, net 83.00. 



A Text-book which presents the broad facts and principles of the science from the 

 latest viewpoint; and in which an even balance has been preserved between the physio- 

 graphic, structural, physical, and chemical branches of the geological field. 



Part II. Historical Geology. By Charles Schuchert. vi-j-622 pages, 6 by 9, 211 

 figures in text. 40 plates and colored map. Cloth, net -$3.50. Deals with historical 

 geology. Several special chapters and appropriately added matter on zoology, botany, 

 processes of evolution, etc., are also introduced. 



ECONOMIC GEOLOGY.— By Professor Heinrich Reis. Ph.D., Cornell University. 

 Fourth Edition, Revised and Enlarged. xviii4-856 pages, 6 by 9, -291 figures, 75 plates. 

 Cloth, net $5.00. This book presents first, the nonmetallic minerals and then the metallic, 

 thus leading the reader from the simpler to the more complex phases of the subject. 



ENGINEERING GEOLOGY.— By Professor Heinrich Reis, Ph.D. and Thomas L. 

 Watson, Ph.D., Professor of Economic Geology in the University of Yirginia, and State 

 Geologist of Yirginia. Second Edition, Enlarged, xxvii+722 pages, 6 by 9, 249 figures 

 in the text and 104 plates. Cloth, net $5.00. 



A presentation of geology for the engineer outlining those fundamental principles' 

 which relate to engineering practice, including the character of rocks, their use in build- 

 ing, their structure, and their relation to tunneling, etc., and the geological conditions 

 which affect and control underground water supplies. 



AGRICULTURAL GEOLOGY. (JUST PUBLISHED)— By the late Frederick V. Emer- 

 son, Ph.D.. formerly Professor of Geology and Geologist for the State Experiment Station,, 

 Louisiana State University. 319 pages, 115 figures, 6x9. Cloth, $3.00 net. 



This book describes the processes and principles of Geology with special reference 

 to the geology of soils and of mineral fertilizers, It is a teachable text-book for univer- 

 sity classes as well as reading and correspondence courses. 



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