MINERAL PRODUCTS. 
45 
sinking of a well, the walls of which caved in, revealing a cavern in 
limestone. The floor, ceiling, and walls of the cave were found to be 
composed of celestite, and the owner reported that the mineral was 
found to a depth of 22 feet below the floor. 
In 1904 a deposit of celestite was developed 5 miles north and a 
little west of Austin, Tex., in the Mount Donnell and Mount Barker 
district. The celestite is associated with strontianite, Epsom salts, 
and other minerals, and occurs in a flat-lying arenaceous and argilla 
ceous magnesian limestone bed in the Glen Itose limestone (Lower 
Cretaceous). 
An occurrence of celestite has been noted near Cedar Cliff, Mineral 
County, W. Va. The rock in which the celestite crystals occur is a 
thickly bedded, nearly horizontal argillaceous limestone. The celes 
tite occurs in crystalline form in flattened lenticular cavities or 
pockets from a foot to a yard in diameter and from 3 to 7 inches in 
height. In the adjacent limestone strontium sulphate was found so 
abundantly as to indicate that the rock was strongly impregnated. 
Celestite is known to occur at Drummond, Chippewa County, Mich. 
In Monroe County of the same State it is found disseminated through 
dolomite, and at the point especially studied the upper layer of the 
rock contained over 14 per cent of celestite. Below this layer there 
is a porous stratum with cavities containing celestite and free sul 
phur. The sulphur is found in considerable quantities and was prob 
ably formed by reduction of the sulphate. 
Celestite has also been found near Frankstown, Blair County, Pa. ; 
in Brown County, northeastern Kansas; in Larimer County, Colo.; 
in cavities in limestone near Nashville, Tenn. ; and associated in fine, 
clear crystals with the colemanite of Death Valley, San Bernardino 
County, Cal. Strontianite occurs with celestite in New York, as 
already noted, and is also found in Mifflin County, Pa. 
OTHER PRODUCTS. 
The demand for several of the minor mineral products will be 
•stimulated by the changes in trade with Europe, with the result of 
increasing materially the production for 1914 and following years. 
In the case of pottery this movement toward a stronger hold of the 
domestic market is already well under way. The production in 1913 
was the largest in the history of the industry. The underlying 
cause of this prosperity is no doubt the improvement in the charac 
ter of the American product in texture, finish, color, decoration, and 
the prevention of crazing, some of the higher grades of American 
pottery equaling if not surpassing some of the best imported ware. 
The imports of pottery have always been more or less interesting. 
Por many years the value of the imported pottery exceeded the 
value of that made at home, but about the close of the nineteenth