386 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 1902. [bull. 213. 
station. The clay is said to be as good, if not better, than that from 
the Prewitt pits. 
Stoneware clays of the same general type as those described above 
are well exposed, and have been worked rather extensively, near 
Lagrange, 3" miles west of Grand Junction. About 5 miles east of 
Grand Junction, at Saulsbury, clay is also worked; but the material 
from this locality may be the dark-colored ball clay (of the Lignitic 
Tertiary), described later as occurring in a belt bordering the stone- 
ware- clay region on the east and outcropping near Pinson and Paris, 
Tenn. 
TOONE, HARDEMAN COUNTY, TENN. 
A large pottery located at this point could not be visited during the 
course of field work, and no information concerning it was obtainable 
by correspondence. 
PINSON, MADISON . COUNTY, TENN. 
A large pottery located near Pinson station is operated by Messrs. 
Robins and Henderson. The plant, which is run entirely by steam, 
is by far the best equipped that was seen on this trip. Fire brick, 
tiles, and stoneware are manufactured, and, to a small extent, com- 
mon brick. The engine supplies about 35 horsepower to the plant. 
It should be recollected that usually pari of the machinery is idle, as 
it is but rarely that both stoneware and fire brick are in process of 
manufacture. 
The clay for stoneware passes through the following processes in 
order: 
1. Crushing (crusher). 
2. Grinding (wheel). 
3. Turning (hand work, wheel run by steam). 
4. Drying (on heater). 
5. Burning. 
The kiln used is down draft of the Stewart pattern, the rights being 
owned by the Stewart Patent Kiln Company, of Findlay, Ohio. The 
right to erects one kiln costs $100. It is fired entirely with wood. 
One burning requires about 15 cords, costing here about $1.50 per 
cord. The production of stoneware is about 2,500 gallons per day. 
The same clay is used for fire brick, in which case it passes through 
the following machines: 
1. Disintegrator. 
2. Pug mill. 
3. Brick machine. * 
The mixture used for fire brick- is — 
3 parts clay. 
1 part white sand. 
1 part sawdust. 
