252 
Transactions Texas Academy of Science. 
Extract. 
“I am .satisfied, liowever, that by combining tanks and artesian wells, 
that part ef Texas west of the 97th meridian can be irrigated successfully 
.at about one-half the expense of either the 'California or Colorado systems. 
-SS- -Sf- * * -Sf * 
“Our streams generally cannot be depended upon. The ravines running 
down from our small mountain formations are usually underlaid by joint 
clay or solid rock, and are well adapted for tanks and small lakes. In 
nearly all of our valleys artesian wells are obtained at depths ranging 
from 100 to 600 feet. Indeed, some few wells have been obtained on 
mountain elevations. One just finished, about five miles from this place 
[Morgan, Ba'^que county] , yields from thirty to thirty-five gallons per 
minute, and must be nearly 250 feet above bhe level of the adjacent creeks. 
This well is nearly 800 feet deep. There are between one hundred and 
two hundred wells in this und Somervell counties, yielding all the way 
fi'om five to one hundred gallons per luiniite. Two or three such wells 
would supply the loss from evaporation and seepage, and keep a tank 
covering from ten to fifty acres full during fhe dryest years. Such a 
tank would easily supply sufficient water for several hundred acres.” 
402. Thompson, E. A. 
Eeport on the Soils, Water Supply, and Irrigation of the Colo- 
rado Coal Field. 
Fourth Ann. Eept. of the Geol. Surv. of Texas, 1892, Ft. I, 
pp. 447-481. Austin, 1893. 
Contents: Soils: Eesidual Soils; Transported Soils; Alluvial iSoils; 
Analyses of Soils. Timber. Water and Water Supply: Rivers; Creeks 
and Branches ; Springs ; Wells ; Tanks and Artificial Reservoirs ; Artesian 
Wells; Mineral Water. Irrigation: Irrigable Lands; Methods of obtain- 
iug water for irrigating; Dams .and Impounding Reservoir Embankments; 
Rainfall, Tables of Annual Precipitation; Alethods of Irrigating; Measure- 
ments and Duty of Water. 
“The area herein discussed is illustrated on the map, and includes the 
major portions of .Comanche, Brown, Coleman, Runnels, Concho, MoCul- 
loeh, San Saba, and Alills counties. '*■ * 
“The province of this report will be to discuss in detail the character, 
distribution, adaptability to certain crops, timber, etc., of the various soils 
of our district, the extent, nature, etc., of its water and general water 
supply, and the feasibility of establishing systems of irrigation whereby 
its ‘dry lands’ may be reclaimed and those already under cultivation be 
made more productive, with designs of dams, estimates of the amount of 
the annual rainfall available for irrigating, etc., and is subsidiary to the 
general report on the same area by Air. Drake, to whom I am indebted 
for general data, materials for analysis, etc., and otherwise assisting me 
with this report.’’ P. 449. 
