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Proceedings of the Academy of Natural Sciences of Philadelphia
Vol. 26, No. 3 (Oct. - Dec., 1874), pp. 164-172
Published by: Academy of Natural Sciences
Stable URL: http://www.jstor.org/stable/4624433
Page Count: 9
You can always find the topics here!Topics: Coal, Teeth, Sandstones, Smoke, Animals, Geology, Shales, Altitude, Property lines, Rocks
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