26 
Tkansactions Texas Academy of Science. 
Ashburner, Charles A. 
“Total prockietion in 1887, 75,000 short tons; spot value, $150,000. 
(!See also table ‘Production of Coal in the United 'States in 1887,’ p. 
171, of the same volume.) 
“No reliable statistics of the amount of coal mined in this State are 
available.” P. 357. 
“The largest mine in the State from which returns were received by 
the Survey was that operated by 'Mr. P. H. Hartz, at Eagle Pass, Maverick 
county. This mine produced during the year 2'2,700 tons, including nut 
and slack ooal. Of this production, 17,400 tons were shipped to San 
Antonio or supplied to the Southern Pacihe Company for locomotive use. 
- This coal commanded in 1887 a price of $2.2'5 per ton at the mines. The 
coal is used for stationary engines and loeomotives. The bed worked is 
6 feet 4 inches in thickness, and is interstratified with a streak of slate, 
which reduces the workable thickness to 4 feet 3 inches. The coal is 
hard, and has to be blasted with powder. The coal field in this vicinity 
is very large; its exact dimensions have never been established, but the 
outcropping of coal beds can be seen for miles up and down the Kio Grande 
river in the vicinity of Eagle Pass. The mine operated by Mr. Hartz is 
iabout 5 miles northwest of Eagle Pass.” P. 358. 
Art. iCoal. Min. Eesonrces of the IT. S. 1888. 
('Coal in Texas), pp. 367-374. .Washington, 1890. 
Outline: Production and value, 1888. ‘Location of the more prominent 
mines of the State (Carboniferous and Cretaceous). Texas and Pacific 
Coal Company. The iSpring Mine, 110 miles east of El Paso. Thickness 
of seam and depth below the surface. Preliminary report of E. T. Dum- 
ble, (State Geologist to the U. S. Geol.' 'Surv. : Three coal fields. (1) 
Central Coal Field, Carboniferous, bounded. Dr. Charles A. Ashburner 
on the coal-bearing strata. (2) Nueces or Semi-bituminous Field, 
bounded. Number and lage of seams., ' Where worked. Character of lig- 
nites. (3) Lignitic Field, bounded. Number and thickness of seams. 
•Carboniferous formation of North Texas. 'Boundaries. Thickness. Coun- 
ties embraced in the true coal measures. Number and thickness of seams. 
'Section of coal-bearing strata near Millsiap. Information concerning the 
following mines (location, thickness of seams, etc.) : Gordon, Palo Pinto 
county; Johnson, between Gordon and iStrawn; at Cisco; outcrop east of 
Putnam; ten miles west of Decatur; Stephens, four miles west of Bowie. 
R. A. F. Penrose on lignites of Eastern Texas number and thickness of 
beds. Chlaraeter of lignite. Outcrops in Van Zandt co'unty; along the 
line of the Texas and Pacific. Prof. Gustav Jermy reports deposits in 
southwestern counties. Col. John L. Tait reports lignite in Edwards, 
Bandera, Medina, Atascosa and Frio counties. Outcrop fourteen miles 
■southwest of Uvalde; thickness. The western boundary of this field. 
Coal seam at Eagle Pass. Extent of outcrop. Inclination of stratum. 
Thickness in Hartz mines; character and stratigraphical position. 
“Total product in 1888, 90,000 tons; spot value, $184,500. On account 
of the very scattered and meagre developments of the coal and lignite beds 
of Texas it has been impossible to collect any reliable statistics as to the 
