Record of Geology op Texas, 1887-1896. 
71 
Dana^ James D. 
Texas : Mean Height of, p. 23 ; Archaean in, pp. 444, 446, 447 ; Cam- 
. brian, pp. 464, 466, 469, 477, 484; lUpper Silurian, p. 537; Devonian, pp. 
575, 580; iSuib-iCarboniferous, p, 637; Carboniferous, pp. 648, 690, 693; 
■Permian, pp. 660, 685, 687, 688; Triassic, pp. 660, 746; Cretaceous pp. 
817, 824, 854; Disturbances in, p. 868; Tertiary, pp. 884, 885, 888; Quar- 
ternary, p. 378. 
85. (Day, David 'T.) 
Art. Gold and Silver. Min. Eesources of ihe D. S. 1888. 
(Silver Production in Texas, 1887, 1888), p. 37. Washing- 
ton, 1890. 
From a table showing the “’Approximate distribution in round numbers 
of the estimated total products of precial metals in the United States 
during the calendar years 1881 to 1888, inclusive,” the following statistics 
are taken: 
STATE. I 1887. 1888. 
Texas $250,000. $300,000. 
86 . ( ) 
Art. Lithographic Stone. Min. Resourees of the D. S. 1889- 
1890. 
(Lithographic Stone in Texas), p. 519. Washington, 1892. 
Property of the Texas ’Lithographic 'Stone Company in Blanco county. 
Mr. John A. iRoper, of Marble Falls, resident superintendent, reports that 
the company has placed machinery on the ground for quarrying, sawing 
and dressing stone. 
87 . ( ) 
Art. Gold and Silver. Min. Resources of the TJ. S. for 1895, 
Part III, Seventeenth Ann. Rept. D. S. Geological Survey. 
(Silver in Texas), p. 72. Washington, 1896. 
In a table here published, entitled “Approximate distribution, by produc- 
ing 'States and Territories, of the product of gold and silver in the United 
'States for the calendar year 1895, as estimated by the Director of the 
Mint,” Texas is credited with the production of 450,000 fine ounces of 
silver, having a coining value of $581,810. 
88. Day, William G., 
Art. Structural Materials. iMin. ReS'Ouroes of the D. S. 1886. 
('Building Materials in Texas), p. 530. 'Washington, 1887. 
In Austin, stone in combination with brick is used in the finest build- 
ings. The s'tone most used is a magnesian limestoine, locally quarried. 
Granite from Burnet is used to some extent. Bricks yellow. In Galveston 
one house was erected in 1886 from a close grained sandstone quarried in 
Brown county. The trimmings were of granite from Burnet. 
