Hand drawn lines indicate yearly rainfall amounts for various areas. At head of title: "Department of the Interior General Land Office J. A. Williamson, Commissioner." From the Collection of Raphael Pumpelly ; rainfall and irrigation data added by hand. MS notes on rainfall. 317919. Prime meridian: GM, Washington. Relief: hachures. Graphic Scale: Miles. Projection: Polyconic. Printing Process: Lithography.
Extent
1 map ; hand col. ; 57 x 76 cm., sheet 66 x 79 cm.
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