—, Pittsburgh coal strata, xxix, 68.f
—, —, amount of coal consumed at, xxix, 79.
—, —, manufactures of, xxix, 79.
—, Pottsville or Mount Carbon, J. Pierce, xii, 63, 65.
—, —, descent from, to Philadelphia, xii, 64.
—, —, Carbondale, xviii, 313, 319, 324.
—, salt wells of Conemaugh and Kiskiminitas, xxix, 72, 74.
—, — — —, coal consumed in the manufacture, xxix, 79.
—, — springs of Conemaugh and Kiskiminitas, and manufacture, xii, 70.
—, — — near Pittsburgh, xii, 72.