102 
Transactions Texas Academy of Science. 
Dumble^ Edwin T. 
duetiiion,” 10th Census, Bulletin N.o. 25 of the Texas Agricultural Experi- 
ment Station, and the Publications and Records of the Geolofgical Survey 
of Texas. 
152. 
- Cretaceous' of Western Texas and Ooahuila, Mexico. 
Bull. Geol. Soc. Amer.^ Vol. VI, pp. 375-388. 1895. 
Contents: Introduction. Localities of Occurrence, Character and Rela- 
tions of the Rock. San Lorenzo iSection — Its Location and the Character 
of the Country; Details of the iSection. Lower Cretaceous; Bosque Divis- 
ion — Its Members ; Flat Mesa Sections ; Kent Sections ; Exposures in the 
Arboles and Burras Mountains; Episodes of the Bosque Period. Fred- 
ericksburg Division — ^M^est of the Pecos River ; In the 'San Lorenzo Section ; 
Caprina crassifihra as a Criterion of Fredericksburg Age ; The Kent Local- 
ity. Washita Division — in the Trans-Pecos Area; At the Kent Locality; 
Devil’s River Section; in the San Lorenzo Section; The Finley-Fagle Moun- 
tains iSection; Comparisons with other Localities. Upper 'Cretaceous: 
Geologic Succession and Correlations; Dakota Division; Colorado Division; 
Montana Division — ^Its Importance; Areas Investigated by the Author; 
General 'Section; Fossils; Dikes; Folds; Faults, and Lava Flows. 
“IVhile in its broader features the Crejtaeeous of Western Texas and of 
the northern portion of tlie Mexican State of Coahuila corresponds closely 
with that of the Colorado River section east of it, there are, nevertheless, 
many important differences in the stratigraphy and faunal relations well 
worth more detailed study than they have yet received. A few of these dif- 
ferences, which have come under my personal observation during trips made 
through various parts of the region, are presented as indicating the general 
character of the formation. 
‘‘Only a few remnants of areas are found north of the Texas and Pacific 
railroad, and that line may well be taken as marking the. northern bound- 
ary of the Cretaceous deposits of Western Texas, since, as a body, they 
pass north of it only (if at all) under that portion of the road which 
crosses the Llano Estacado.” P. 376. 
The 'San Lorenzo .Section was made in northern Coahuila, Mexico. 
153. 
Texas. Brown Coal. 
Eng. and Mining .Journa.'l, A^ol. LXII, p. 343. X. Y., Oct. 
10, 1896. 
Attention is called to the constantly increasing use of brown coal as a 
fuel. .After being tried with success under stationary boilers its use has 
extended to locomotives on raili’oads. The subject of “Brown Coal and 
Lignite” is treated by Mr. Duinble in .a volume bearing that title pub- 
lished by the State Geological 'Survey in 1892. The comparative value 
of brown coal and bituminous coal is there given at 7 to 10. “In engine 
performance it is found that 1.4 tons of brown coal yield the same results 
as one ton Indian Territory coal. Taking the cost of the tW'O fuels into 
