< Page:Popular Science Monthly Volume 81.djvu
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30
THE POPULAR SCIENCE MONTHLY
Photo. W. H. Rau, Philadelphia.
Pier at Brighton, Trinidad, from Shore.
It consists, like all the other more or less solid native bitumens, of components of two different classes, which can be separated by solvents;
Photo, C. R. Toothaker, Phila. Commercial Museum.
Pitch Cones on Edge of Trinidad Lake.
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