82 
Trails ACTIONS Texas Academy of Science. 
Dumble, Edwin T. 
be selected to mix with them. It is possible that ores of the desired quality 
may be found lamong these deposits, or it may be necessary to use some of 
the Llano ores for this purpose. 
“'Numerous detached islands of the Cretaceous formation, scattered 
through this region, furnish limestone sufficient for smelting purposes, 
while for fuel there are immense forests of pine, oak, etc., which cover 
the eastern part of the fState, and the deposits of lignite which underlie 
■ the entire territory, and which will undoubtedly be made use of as soon as 
the erection of iron furnaces and the reduction of ores begin in earn- 
est. 
“From Sabine to Cass county on the east, and extending west to Bastrop 
county, these deposits are found, scattered over thousands of square miles 
of territory; and while they are not found in all the counties within these 
boundaries, and sometimes when found are of too impure quality, or in too 
small quantity, to be of economic value, yet it is a fact fully demonstrated 
by the examinations already made that in these deposits we have an 
almost limitless supply of ore for many years.” 
-X- * -X -X- -x- 
113. 
Geological Survey of 'Texas, Circular No. 3. Nov. 1, 1888. 
(Official.) 
Geological and Scientific Bulletin, Vol. I, No. 7. ‘Houston, 
November, 1888. 
This circular, accompanied by a map, was addressed to the more intelli- 
gent citizens of the different counties of the '.State for the purpose ( 1 ) of 
obtaining information concerning the economic minerals known or thought 
to occur in Texas, (2) of correcting existing maps, and (3) of securing 
personal observations on the local geology, soil, irrigation, quarries, etc. 
The following list of economic minerals in Texas is appended: 1, 
Asphaltum; 2, Arsenic; 3, Asbestos; 4, Barytes; 5, Bat Guano; 6, Copper; 
7, Coal (including Lignite) ; 8, 'Strontian Sulphate; 9, Chalk; 10, Diato- 
maceous .Earth (Tripoli) ; 11, Feldspar; 12, Flint; 13, Fluor 'Spar; 14, 
Fire Clays; 15, Cold; 16, Millstone Crit; 17, Whetstone Material; 18, 
Graphite; 19, Gypsum; 20, Glass Sand; 21, Marls; 22, Iron; 23, Kaolin; 
24, Lead; 25, Manganese Ore; 26, Mineral Waters; 27, Building Stones 
and Marble; 28, Cement IRioek; 29, Limestone and iShells for Lime; 30, 
Lithographic 'Stone; 31, Ochres; 32, Mineral Paints; 33, Petroleum; 34, 
Natural Gas; 35, Pyrites; 36, .Silver; 37, Salt; 38, Sulphur; 39, Soapstone; 
40, Mica; 41, Alum Shales; 42, Saltpetre; 43, Brick Clays. 
114. 
Texas Aspfialtum. 
Geological and Scientific Bulletin, Vol. I, No. 11. Houston, 
March, 1889. 
Need of material in Texas suitable for pavements. lUse of Trinidad 
asphalt mixed with calcareous matter in imitation of the Val-de-Travers 
deposit., Quotation from Dr. Ure on bitumen and calcareous earth. 
