BY THE SAME AUTHOR 



An Introduction to Geology 



Cloth, illustrated, 12mo, 816 pages, $2.60 



This is intended to serve as an Introduction to the science of 

 Geology, for both students who desire to pursue the subject 

 exhaustively, and those who wish merely to obtain an outline of 

 the methods and principal results of the science. This is not one 

 of the text-books which always pronounce a definite and final 

 opinion. The author holds that in no science are there more open 

 questions than in Geology, in none are changes of view more 

 frequent, and in none is it more important to emphasize the dis- 

 tinction between fact and inference, between observation and 

 hypothesis. The student is here encouraged to weigh evidence 

 and balance probabilities and to suspend judgment when the 

 testimony is insufficient to justify decision. The author is an 

 advocate of the new geology, and his book presents all the latest 

 advances in science. After an introductory chapter and a survey 

 of the rock-forming minerals, the author takes up in turn Dy- 

 namical Geology, Structural Geology, Geomorphology and 

 Historical Geology. An appendix contains a classification of all 

 plants and animals possessing importance as fossils. Over three 

 hundred illustrations largely from photographs and numerous 

 plates enhance the practical value of the book. 



THE MACMILLAN COMPANY 



Publishers 64-6G Fifth Avenue New York 



