You are not currently logged in.

Access JSTOR through your library or other institution:


Log in through your institution.

Journal Article

November 10

Proceedings of the Academy of Natural Sciences of Philadelphia
Vol. 26, No. 3 (Oct. - Dec., 1874), pp. 164-172
Stable URL:
Page Count: 9

You can always find the topics here!

Topics: Coal, Teeth, Sandstones, Smoke, Animals, Geology, Shales, Altitude, Property lines, Rocks
Were these topics helpful?
See something inaccurate? Let us know!

Select the topics that are inaccurate.

  • Download PDF
  • Add to My Lists
  • Cite this Item
We're having trouble loading this content. Download PDF instead.