858 REVIEWS 
Other papers — such for example—as The Microstructure of Steel 
and the Current Theories of Hardening, by ALBERT SAUVEUR, have 
direct application to the broad domin of theoretical geology. 
C. F. TOLMAN Jr. 
The Law of Mines and Mining tn the United States. By DANIEL 
Moreau BARRINGER and JoHN StToKES ADaAms. Little, 
Brown, & Co., Boston, 1897. 
Although primarily a legal work this book possesses not a little 
interest and value to geologists in general and especially to those 
who have to deal with economic interests. It opens with a geological 
preface in which the various kinds of mineral deposits that are liable 
to be subjects of litigation are defined and their modes of occur- 
rence and to some extent their origins are briefly stated, as these 
features are often decisive in the legal classification of the formations. 
The purpose of the work is to give a better appreciation of the reasons 
for the established legal distinctions relative to mineral deposits, inso- 
far as these are based on differences in the nature, the mode of occur- 
rence or the origin of the deposits. While the matter is not new to 
geologists and makes no pretension to exhaustiveness, its special point 
of view gives not a little freshness to the sketch. The legal classifica- 
tion of ore deposits is not without its suggestiveness to scientific 
students. 
The body of the book opens with a chapter on property in min- 
erals where there has been no division between the ownership of the 
surface and of the mineral below, followed by one on property rights 
where the title to the mineral or the right to take it out is vested in 
some one who is not the owner of the soil. It then treats of min- 
eral leases and the rights and duties arising thereunder, and the modes 
of assignment and termination of leases. Chapters follow on the 
property of the sovereign and its grantees in minerals, for example, 
minerals in the beds of navigable streams or under public highways or 
in lands taken by eminent domain. There is also a discussion of 
the government’s title and the granting thereof. A chapter is 
devoted to the discovery and location of claims, another to the 
extent of claims, and one each to the method by which claims are 
held, to the local mining rules and regulations, to the method by 
which title to mining claims may be terminated, and to the reloca- 
