60 PHYSICAL GEOLOGY 



SHALER : Aspects of the Earth, pp. 46-97. (New York, 1889.) 

 The topics of this and later chapters are discussed at greater 



length in larger textbooks and manuals. Among the best of these 



are : 



CHAMBERLIN AND SALISBURY : Geology. 3 vols. (New York, 1904, 



1906.) 

 College Geology. (New York, 1909.) 



DANA : Manual of Geology. 4th ed. (New York, 1895.) 



GEIKIE : Textbook of Geology. 4th ed. (London, 1903.) 



