282 
Transactions Texas Academy oe Science. 
Rothwell^ Eiceiard P. 
From a table showing the production of Portland cement in the United 
States the following statistics are taken: 
(In Barrels of 300 pounds.) 
STATES. 
1893 (a) 
1894. 
Barrels. 
Value at works. 
Barrels. 
Value at works. 
Total. 
Per Bbl. 
Total. 
Per Bbl. 
Texas 
20,000 
$ 40,000 
S 2 00 
25,000 
% 50,000 
S 2 00 
(a) Revised. 
458. . Editor. 
Art. Gold and Silver. 
Mineral Industry, etc., 1894, Yol. III. 
(Production of Silver in Texas), p. 278. N. Y., 1895. 
In a table showing the production of gold and silver in the United States 
by State, Texas is credited with 429,314 fine ounces of silver foT 1894. 
459. , Editor. 
Art. Gypsum. 
The Mineral Industry, etc., 1894, Vol. III. 
(Production of Gypsum in Texas), p. 355. N. Y. 1895. 
From a table showing the production of gypsum in the United States 
the following statistics are taken: 
(In Tons of 2,000 pounds.) 
STATE. 
1892. 
1893. 
1894. 
Tons. 
Value. 
Tons. 
Value. 
Tons. 
Value. 
Texas 
1,420 
$ 8.520 
1,815 
$ 10,750 
3,550 
$ 21,300 
460. , Editor. 
Art. Salt. 
The Mineral Industry, etc., 1894, Vol. III. 
(Production of Salt in Texas), p. 488. Y. Y., 1895. 
The following statistics are taken from a table showing the salt produc- 
tion in the United States : 
