Notes on the Comparative Geology of North-eastern Ohio and Northwestern Pennsylvania, and Western New York, by JP Lesley. 8 vo., pp. 127, with 2 maps, a long section, and 7 cuts in the text. Price in paper, 90 60; postage, $0 05.
A Revision of the Bituminous Coal Measures of Clearfield County
by Henry Martyn Chance - 1884 - 203 pages
Full view -