64 
RIO GRANDE COAL FIELDS OF TEXAS. 
[bull. 164. 
MINES. 
There are only two mines in the Santo Tomas coal field. They have 
been mentioned already, and are the Santo Tomas (Rio Grande Coal 
and Irrigation Company) mine at Santo Tornas, and the mine of the 
Cannel Coal Company, 3 miles southeast of Santo Tomas. The 
coal in the Santo Tomas is mined on a slope (tunnel). Work was 
begun at 31 feet above the level of the Rio Grande, and has been pros- 
ecuted through 2,400 feet, to the level of the river. The dip is 2° N., 
40° E. The mine has been in operation about fourteen year^ (1895). 
The output is from 90 to 100 tons daily, and most of it is sold to the 
International and Great Northern Railroad. 
The Cannel Coal Company take their coal from a shaft. At the 
time of the writer's visit to the mine (1895) the shaft had been com- 
pleted, entries driven, and everything was ready for actual mining to 
begin, but up to that time no coal had been shipped. 
CHARACTER OF COAL. 
The coal of the Santo Tomas field is hard, lustrous black, with a 
brown streak and a conchoidal fracture. No woody structure was 
apparent. 
The following analyses were made for the writer by Dr. Peter 
Fireman : 
Analysis of coal from, mine of Rio Grande Coal and Irrigation Company. 
Upper bench. 
Lower bench. 
Moisture 
2.26 
48.64 
36. 15 
.74 
12.95 
Yellowish brown. 
Coherent, lustrous. 
2.63 
45.67 
39. 96 
.87 
11.74 
Brown. 
Coherent. 
Vol. hydrocarbon 
Fixed carbon 
Rati0 V F H°C.} 
Ash 
Color of ash 
Coke 
