Among the Forces — Old Faithful Geyser . . . . Frontispiece Breaking Waves Incline at Mauch Chunk The Head of the Toboggan Slide. The Big T

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Among the Forces Old Faithful Geyser . . . . Frontispiece Breaking Waves Incline at Mauch Chunk The Head of the Toboggan Slide. The Big T · ch 3/39

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