— —, —, J. Pierce, xii, 55.
— —, —, of the Belmont mines, Penn., xii, 301.
— —, —, mine of Carbondale, xviii, 319.
— —, — —, of Mauch Chunk, B. Silliman, xix, 12.f
— —, beds of, ibid, notice of, xx, 163.
— in Pennsylvania; mines of Wyoming valley, Z. Cist, iv, 1.f
— —, —, of Wyoming, on the rocks accompanying, vii, 260.
— —, —, of Wyoming and Lackawanna valleys, account of, B. Silliman, xviii, 308.f
— —, on Tioga river, analysis and description of, W. Meade, xiii, 32.
— —, in the Monongahela valley, S. P. Hildreth, xxix, 58.f