242 
Transactions Texas Academy oe Science. 
Taff, J. a. 
Croverning the Artesian Water Conditions: Trinity Sand, Glen Rose 
(Alternating) Beds, Palnxy Sand, Fredericksburg and Washita Divisions, 
Dakota Sands, Eagle Ford Clays, The Austin Limestone. Artesian Basins: 
The Trinity Artesian Basin. Area of Shallow Wells in the Trinity Basin. 
The Paliixy Artesian Basin. Area of Artesian Flow on Red River. 
Dakota Artesian Basin: Dakota Flow in the Brazos River Valley, Arte- 
sian Flow in Chambers Creek Valley, Artesian Water in Mountain Creek 
Valley, Dakota Artesian W^ater in the Trinity Sands. Springs. Relative 
Value of Flowing and Non-flowing Wells. 
Chapter VIX. Soils: Residual Soils of the Comanche Series; Soils of 
ithe Texana, Comanche Peak and Caprina Limestones; Soils of the Kiam- 
itia Clay; Soils of the Fort Worth Limestones and Denison Marls; Soils 
of the Exogyra Arietina and Vola Limestone and Marl; Soils of 
the Upper Cretaceous: DakoXa Sands, I^ower Cross Timbers Area; Soils 
of the Black Land Prairie; Soils of the High Land Drift. Transported 
Soils: Soils of the Brazos Valley; Soils of the Trinity River Valley; 
Soils of the Red River Valley; Analyses. 
Chapter VI'II. Topographic Features and Drainage. Topography of 
Grand Prairie. Topography of the Black Land Prairie. High Land 
Drifts. Basal Gravel Drift of the Stream Valleys. 
“This report is a continuation of the work begun in the Third Annual 
Report for 1891 on the geology of the Cretaceous north of the Colorado 
river. In the report for 1891, the geology of the Bosque division, which 
is the lowest of the system, was treated of as it occurs through its whole 
extent north of the Colorado river and the geolo-gy of a section of the 
Cretaceous sj’-stem between the Colorado and Brazos rivers was also given. 
The present report takes up the geology in the natural ascending order 
of the rocks north of the Brazos river, beginning at the base of the Fred- 
ericksburg division, where it was left off in the previous work. In their 
order of succession the Fredericksburg and Washita divisions of the 
Comanche series were studied, after which the Dakota (Lower Cross Tim- 
bers), the Eagle Ford, and basal portions of the Austin limestone forma- 
tions were taken up and worked in as close detail as was possible in the 
time alloted.” P. 2.41. 
“The work on artesian water is an advance on the knowledge of this 
subject, in the Texas region, especially in the methods of its presentation. 
The source of the artesian water and the conditions governing its flow have 
been studied and discussed, independently, by Air. Robert T. Hill and the 
writer; therefore, whatever may be added on this division of the subject 
is simply an enlargement of former work. In brief, the report on arte- 
sian water discusses the subterranean artesian basins with special regard 
to their sub-areal extent, variations in thickness and water transmitting 
power, and the deliniations of the areas of flowing and non-flowing wells 
for each of the three artesian basins, viz. : the Trinity, the Paluxy, and 
the Lower Cross Timbers, instead of the local disconnected divisions here- 
tofore considered. All of these features are graphically outlined upon 
the artesian map, or portrayed in the sections, with lines showing approx- 
imate depths required for wells to penetrate each artesian basin.” P. 242. 
