224 
THE CLAYS OF ARKANSAS. 
Analyses of shales from Round Mountain, Ark., Cheltenham, Mo., and Akron, Ohio. 
Silica (Si0 2 ) 
Alumina (A1 2 3 ) 
Ferric oxide (Fe 2 3 ). 
Lime (CaO) , 
Magnesia (MgO) 
Potash (K 2 0) 
Soda (Na 2 0) 
Loss on ignition 
Sulphur (S) 
Water loss at 110 o -llo° C. 
Round Mountain. 
Missouri. 
Ohio. 
1. 
2. 
3. 
4. 
04.04 
57. 12 
56.86 
60.05 
21.55 
24.32 
28.07 
20.00 
5.01 
8.21 
5.03 
6.82 
.59 
.72 
.27 
.52 
.90 
1.74 
.32 
.45 
1.50 
2.07 
.11 
1.79 
.80 
.53 
.90 
1.60 
5.94 
7.58 
10.88 
6.96 
.14 
.22 
1.95 
100.59 
102.51 
102.50 
100. 14 
1.30 
1.75 
3.84 
1.25 
1. From the bed of shale lying between the two coal beds exposed at west end of mountain. J. P. 
Smith, analyst. 
2. From above uppermost bed of shale in the section. J. P. Smith, analyst. 
3. From shale banks at Cheltenham, Mo. This is the material of which the Laclede Company manu- 
factures its fire-clay goods. Brackett & Smith, analysts. 
4. From Akron, Ohio; material used in the manufacture of sewer pipes, etc. Brackett & Smith, 
analysts. 
A comparison of these analyses shows that the clay shales of Round 
Mountain are well adapted to the manufacture of fire bricks, sewer 
pipes, and such goods as are made of the similar clay shales at Chel- 
tenham, Mo., and Akron, Ohio, as well as of paving bricks for road- 
ways. 
The coal in Round Mountain may perhaps be utilized in connection 
with the shales. At the west end of the mountain Mr. W. S. Brew r er 
has opened a drift on a bed of coal which he reports to be 14 inches in 
thickness. 
Immediately above the coal lies 20 to 24 inches of coal dirt or 
crushed bony coal. During and since the civil war Mr. Charles 
Kantorowicz's coal mine at the east end of the mountain was oper- 
ated, but the drift has been abandoned since the spring of 1877, and 
the opening has been closed by the caving in of its sides. It was 
therefore impossible to examine the thickness of the coal bed at this 
place at the time it was visited. In 1892 Mr. Kantorowicz employed 
Capt. R. N. Scruggs to open the drift, and it was found that the coal 
was 24 inches thick 41 feet from the outcrop. Unfortunately it has 
not been possible to obtain a sample from the Kantorowicz mine, 
but analysis was made of a sample from Mr. Brewer's pit, which 
probably fairly represents the quality of coal of this lower and more 
important bed. The specimen was taken from the 8-inch bed high 
on the side of the mountain, and the coal is of good quality, as may 
be seen from the following analysis: 
Analysis of Round Mountain coal. 
[R. N. Brackett, analyst.] 
Water 1. 224 
Volatile matter 10. 298 
Fixed earbon 78. 119 
Sulphur 3. 149 
Ash 7. 210 
