144 Prof. Johnson’s Report on the Bradford Coal Field. 
“This ore has a brown or ochrey appearance, and being taken from a 
point at no great distance from the outcrop, has evidently undergone 4 
change from atmospheric influences. Its fracture is uneven, and its tex- 
ture analogous to some of the argillaceous shales. Its specific gravity is 
2.7256. It contains of hygrometric moisture, vaporizable at 320° Fah, 
2 per cent.; of water in combination, 4.8 per cent. ; metallic iron, 44 per 
cent.; earthy matter, 24.3. 
“ The remaining four portions of the 10 feet bed, from which the pre- 
ceding sample was taken, were examined, and Sand to yield different 
quantities of iron, from 6 to 16 or 20 per cent. It is probable that in 
working some of the other varieties of ore, portions of this 10 feet bed 
will be found available as furnishing materials to promote the fusion and 
facilitate the working of the richer descriptions, which do not contain a 
sufficient quantity of earthy ingredients to produce a good cinder for the 
pace of the iron in the hearth. 
o. 4. This sample is from a stratum of iron ore and fire clay found 
on Fall creek, at an elevation of about 46? feet above the lower bed of 
coal, or 1158 Sek above the river. The bed of. materials in which it oc- 
curs, is 2 feet 6 inches thick, of which four inches at the bottom are fire 
clay, the remaining portion iron shale, intermixed with flattened reniform 
masses of argillaceous carbonate of iron, and some carbonaceous matter 
derived from fossil vegetable remains. The whole bed, together with the 
superincumbent mass. of coarse sandstone rock, or fine conglomerate, 
appears to have fallen from place, and the situation was not therefore fa- 
vorable for determining the real value of the bed. The sample submitted 
to experiment, was a fair type of the ore in this bed; but it should be ad- 
ded, that all which we could conveniently obtain at this place, had under- 
gone a change, and been reduced from carbonate to hydrate. — Its specific 
- gravity was found to be 3.2113. 
It lust of hygrometric moisture - 3.9 per cent. 
Of combined water eapslled bya a fall red. heat, .-.. 12.7. & 
Pig metal, - = BAe 
Earthy matter, - - - - @ arn ie hens 
Oxygen, - - - - evo BB 
100.0 
“The pig metal is of good quality, soft, gray, and tough. The cinder 
was imperfectly fused, but with 20 per cent. of lime, would probably be 
fully reduce 
*“ No. 5. This ore was discovered on the head waters of Long Valley 
creek, in a decayed and broken down portion of the measures, in such a 
aay as induces me to believe that its original place in the formation 
Rear the level of the lower bed of coal, probably a little above it. Its 
at is brow Seeroee ta and yellowish eiehitis it is evidently a enone 
by the dec m of carbonate. Its specific gravity is 3. 
