REVIEWS 291 
when we consider that the value of iron for 1898 was 116.5 millions of 
dollars against 227 millions for all the other metallic products. Like- 
wise 314 pages are given to the coal and coke industries but the value 
of the coal alone is. 208 million dollars against 145 millions for all 
other non-metallic products. The total value of all the mineral prod- 
ducts for 1898 is $697,820,720 which is an increase over the preceding 
year of $66,966,791 or 10.62 per cent. 
Some of the more important special topics discussed are (1) the 
history of gold mining and metallurgy in the southern states by H. B. 
C. Nitze; (2) the characteristics, uses and domestic and foreign pro- 
duction of manganese ores by John Birkinbine; (3) the slate belt of 
Eastern New York and Western Vermont by T. Nelson Dale; (4) 
more than roo pages of analyses and tests of building stones collected 
from various sources by Wm. C. Day and classified and arranged by 
states; (5) a brief reconnaissance of the Tennesse phosphate fields by 
C. Willard Hayes; (6) the mica deposits in the United States by J. A. 
Holmes; and (7) the mineral resources of Porto Rico by Robert T. 
Hulls and’ A. B.C. Nitze: 
Wo (Cs Isl. 
Les Charbons Britanniques et Leur Epuisement. By Ep. Loz. 
Two volumes. Paris, 1900. 
This work is an exhaustive treatise on British coals, comprising a dis- 
cussion of their history, exploitation, production, consumption, geologi- 
cal occurrence, value, qualities, classification, utilities, and exportation. 
The work as whole is divided into four parts. Part one presents a 
general discussion of the geography and inhabitants of Great Britain 
and Ireland; their social, political, and economic conditions; the 
influence of the coal industry on economics, navigation, naval power, 
and the national debt; the geology of the British Isles ; the history of 
coal production and the statistics bearing on its production and con- 
sumption. ; 
Part two furnishes a description of the coal beds of the United 
Kingdom and discusses their importance and productiveness. This 
is followed by a series of chapters on the industrial and commercial 
geography of the Islands, constituting the third part of the work. 
The fourth part treats of the productiveness of the coal mines, and the 
probable time of depletion. 
