Prof. Johnson’s Report on the Bradford Coal Field, 147 
“No. 9. This specimen was from the stratum of balls three inches 
thick, in the above mentioned opening. Its color is yellowish or dark 
brown. Its specific gravity is 3.4977. 
At 320°, it loses - - - 0.5 per cent. 
Caloined to whiteness, it loses in edit, oxic 256 saS 
And when smelted, yields of pig metal, - - 4.6 “ 
Of earthy impurities, it SAAN sale ae JOY... 
And of oxygen, - ESS ey ae 
100.0 
“The iron is moderately tough, and of a light color, appearing rather 
less favorable for foundry purposes than the results of the other plies in 
the same bed. 
“No. 10. This specimen was found on Wagner’s run, the precise ele- 
vation not ascertained. It appears in many respects analogous to the ore 
in the 37} inch bed on Fall Creek, being a conglomerate of pebbly mas- 
ses of clay ironstone, with a cement of ot and ferruginous matter. 
Its specific gravity is 2.823. 
It contains of water, -— - “ - 9.2 per cent. 
It yields of pig metal, - . - - SOB << 
It contains of earthy —— - _- 50. = 
Oxygen, - - - 11. 
: 100.0 0 
~ No. 11. This specimen, as well as the preceding, was found in the 
channel of Wagner’s run, but as there can be no doubt of its having be- 
longed to a regular stratum of ore not yet explored, but of considerable 
thickness, it was deemed expedient to examine its properties. Its spe- 
cific gravity ~is 3.5065. 
eae yields 50 per cent. of pig metal, soft, gray and tough. It resembles 
strongly the ores found in the bed of Long ‘Valley creek, it in some parts in 
large quantities, and also has a striking similarity to the upper ply in Ma- 
son’s ore pit. It contains but 8 per cent. of matter insoluble in acids. 
‘From the foregoing details, it will be observed that the ras of the 
several ores is as follows, viz.— 
32.5 
No. 1. - No. 7. - 45.0 
2. . 24,2 : 8. - 43.3. 
3. - 44.0 . = << 45.6 
SA SS BSA oTge #955 ggg 
6) fis gee il. 50.0 
6. - 29.4 ities 40.5 per cent. 
_“ Fire Clay.—At least three strata of fire clay have been observed on 
the waters of Fall Creek; one 16 inches thick, under the 37! inch bed 
of iron ore; one 4 feet thick, above the 10 feet bed of ore and iron shale ; 
