722 REVIEWS 
Under “Chemical Geology” some observations are given which 
throw light on the vexed question of dolomization. The origin and 
change of ores is also discussed. 
We de ee: 
Geological Survey of Georgia: WW. S. Yeates, State Geologist. 
Bulletin No. 7, A Preliminary Report on the Artestan-Well 
System of Georgia. By S. W. McCattiz, Assistant Geolo- 
gist. - State Printer, Atlanta, Ga., 1898, pp. 214. 
One of the significant signs of growing wisdom in the administra- 
tion of state surveys is the increased attention given to common 
resources of wide interest as distinguished from rich deposits of imme- 
diate value to a fortunate few only. Among these resources of com- 
mon interest is the water supply which admits of successful treatment 
on a scientific basis, whether in the form of flowing wells or otherwise. 
In real importance it transcends many of the more impressive subjects. 
The present treaties is an excellent expression of this commendable 
policy. ‘The first thirty pages are devoted to a clear exposition of the 
essential conditions of successful artesian wells and practical con- 
siderations relative to them. This is well illustrated. The rest of the 
volume is devoted to the special consideration of the artesian wells of 
Georgia, in which much data of general geological interest is inci- 
dentally included. J.arge artesian resourses are shown. While full 
data are not obtainable, it is clear that notable improvement in public 
health has resulted from the use of these wells. die Os iC. 
