A Manual of Topographic Methods . By Henry Gannett, Chief Topographer U. S. Geological Survey. Washington, Government Printing office. Quarto, xiv+300pp. 18 plates. | Zendy

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A Manual of Topographic Methods . By Henry Gannett, Chief Topographer U. S. Geological Survey. Washington, Government Printing office. Quarto, xiv+300pp. 18 plates.

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