Reviczv of Recent Geological Literature. 261 
aggregating about 300 feet in thickness ; and an upper terrane made up 
of shales, and sandstones of about 1,000 feet in thickness. 
The workable coal lies in one bed 250 feet above the flint-bearing 
limestone. "In the Tse Chou region the average thickness of the main 
or workable coal-bed is probably not less than twenty-two to twenty- 
three feet. At the mine about one and a half miles west of Hsi Ta- 
yang, the coal is worked through a shaft 329 feet deep. I had no op- 
portunity to measure the full thickness of the bed, or to examine more 
than the part that is being mined. Only the lower ten to twelve feet 
of the coal is being mined. I was told by the Chinese miners that the 
full thickness of the bed is thirty feet (Chinese), which is equivalent 
to about thirty-six feet (English)." There is no waste material in the 
coal bed in any of the mines. If twenty-two feet is taken as the average 
thickness and 1.5 as the average specific gravity of the coal, there are 
about 3,000,000,000 metric tons of coal within the 150 square miles, 
which is about the amount of the coal area included in the map. It 
must be remembered that this area is only a little of the ragged edge 
of the great coal fields of Shansi. Most of Shansi has been found un- 
derlaid by large coal fields, and the coal area of this province is greater 
than that of Pennsylvania. 
All the coal of the Tse Chou region is anthracite. The present 
style of working the mines and transporting the coal presents a strik- 
ing contrast to what might be done were modern methods used. The 
great thickness and the almost horizontal position of this coal bed make 
it practicable to run long lines of railroad tunnels through the bed and 
load the cars in the mines for distant transportation. c. R. k. 
MONTHLY AUTHOR'S CATALOGUE 
OF AMERICAN GEOLOGICAL LITERATURE 
ARRANGED ALPHABETICALLY. 
Ashley, Geo. H. (W. S. Blatchley and) 
The lakes of northern Indiana and their associated marl deposits. 
(Dept. Geo). Nat. Res. Ind., 25th Ann. Rep., pp. 31-322, pis. 6-12. 1901.) 
Beyer, S. W. 
Mineral deposits of Iowa in igoo. (Iowa Geol. Sur., vol. 11. pp. 
37-53. 1901.) 
Biddle, H. C. 
The deposition of copper by solutions of ferrous salts. (Jour. Gcol., 
vol. 9, July-Aug., 1901, pp. 430-436.) 
Blatchley, W. S. (and assistants) 
Department of Geology and Natural Resources (Indiana). Twenty- 
fifth nnnual report (1900), pp. 782, 31 plates. Indianapolis, 1901. 
Blatchley, W. S. 
Portland cenment. (Dept. Geol. Nat. Res., Ind., 25th Ann. Rep., 
pp. 1-30, pis. i-s. 1901.) 
