REVIEWS 
Structural and Field Geology. By JAMES GEIKIE. New York: S. 
Van Nostrand Co. Pp. xx+435, 56 full-page plates, 142 illus- 
trations in text. 
The student whom Mr. Geikie seems to have had most prominently 
in mind, during the preparation of this work, is the prospective mining 
engineer. The book is an excellent handbook for those wishing to make 
some practical use of geology or to study the science from a practical 
standpoint. 
The first five chapters deal with rock-forming minerals and rocks. 
In chap. vi the modes of preservation of organic remains in rocks are 
described, and the significance of fossils in geologic studies is briefly 
pointed out. Chap. vii treats of stratification, and chap. viii of concre- 
tionary and secretionary structures. There then follows a full and well- 
illustrated description, occupying the next four chapters, of the structures 
common to sedimentary rocks. The mode of occurrence and the structural 
relationships of eruptive rocks are treated in chaps. xiii and xiv. After 
the student has a knowledge of the chief materials of the earth, of the 
aggregation of these materials in the common rock formations, and of the 
attitudes and relationships of these formations, he is invited to consider 
the alteration and metamorphism of such materials and formations. 
Chap. xv is devoted to the consideration of such changes. In chaps. 
xvi and xvii ore formations are carefully figured and described. 
The next three chapters, xvili-xx inclusive, are devoted to geological 
surveying, and chap. xxi to the preparation of geologic maps and sections. 
These four chapters include numerous practical suggestions on field 
equipment, field methods of work, devices for keeping notes on maps, 
etc.; they are addressed to beginners in field-work, and to them should 
prove very valuable. Chaps. xxii and xxii deal with some economic 
aspects of geological structures. They include such topics as: the search 
for coal, conditions under which coal occurs, the search for ores, general 
considerations which should guide the prospector, geological structure and 
engineering operations, reservoirs, underground water, springs, common 
artesian wells, and the distribution of disease in relation to geological con- 
ditions. Soils and subsoils are the subject-matter for chap. xxiv and the 
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