ECKKb.J CLAYS OF TENNESSEE AND MISSISSIPPI. 387 
The mixing is effected in the disintegrator. The brick machine 
requires 8 men to operate it, as follows: 2 " off-bearer," 1 "take off," 
1 "cut-off," 3 " fill," 1 engineer. The product is about 30,000 fire 
brick or 35,000 common brick per day. 
The slip clays used come from Albany, N. Y., and from Seneca 
Falls, N. Y. The Albany clay is of course often used alone, but the 
Seneca Falls slip is very hard to fuse, and in consequence Albany 
slip is usually added to it, the proportions of the mixture being one- 
third Seneca Falls, two-thirds Albany. The Seneca Falls slip costs 
somewhat more than the Albany clay. It is not so easy to dissolve as 
the Albany slip clay, but when dissolved covers the ware more evenly. 
When used alone it gives a beautiful bright olive glaze. Used in 
combination with Albany slip, it brightens the coloration of the latter 
and also gives a somewhat greenish tint. 
The Robins & Henderson clay pits are located about 2% miles 
southwest of Pinson. A considerable area of clay has been uncov- 
ered at this point, but the actual pits are not very large. The exca- 
vations show about 20 feet of light-yellow sand, underlain by 15 feet 
or more of white clay. 
Three miles southwest of Pinson are the clay pits of Mr. R. M. 
Davis. The section could not be made out clearly, as the sides of 
the pits have been washed in and gullies cut by the rain. About 20 
feet of white clay is shown, overlain by reddish sands, these latter 
containing little streaks of white sand. 
The pits belonging to Mr. Henry Weiss are located about 200 yards 
from Davis's pits. The freshly exposed area is very small, as the 
overlying material has been washed down by the rain, and the section 
is therefore doubtful. Some clay from these pits has been shipped 
to the pottery at Memphis, and occasional shipments have been made 
to the Chattanooga potteries. 
About 3| miles southwest of Pinson are the pits of Mr. C. M. Mor- 
row. These showed the most solid clay seen in the Pinson district. 
At the top of the pits are 2 feet or so of reddish-yellow weathered 
clay, overlying a very dark grayish-black clay, without grit or sand. 
Clay from these pits is now used in the pottery at Jackson, Tenn., as 
noted later. 
As can be seen, the clay pits are all located southwest of Pinson, 
and from 2 to 4 miles distant from the station. On the way to the 
clay pits, sections were seen containing members not met with pre- 
viously. They almost certainly belong to a series low^r in horizon 
than the stoneware clays, but the exact relations were not determin- 
able, as they were not seen anywhere in contact with the pottery 
clays, and no good maps or levels were available. The sections in 
question showed 6 feet of yellow, micaceous, slightly indurated 
sands, underlain by 5 feet of greenish-black sands, also micaceous and 
somewhat indurated. These latter pass downward into harder mate- 
