Page:Popular Science Monthly Volume 80.djvu/542

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THE POPULAR SCIENCE MONTHLY
PSM V80 D542 Grand canyon of the yellowstone national park.png
Grand Canyon of the Yellowstone.

some of the pamphlets in preparation. While they have been carefully prepared they are not intended to be substitutes for the more expensive and elaborate maps printed in colors.

PSM V80 D542 Upper geyser basin yellowstone national park.png
Upper Geyser Basin, Yellowstone National Park.