This is the eighth annual report of the Geological and Geographical Survey that is focused primarily on Colorado exploration during the 1874 season. The 515-page report consists of geological reports by Hayden (Colorado), A.C. Peale (Colorado) and Samuel Aughey (Nebraska). Additional reports include paleontology, archaeology, zoology and topography. The volume is profusely illustrated with related figures, plates, and maps including Geological Map of Colorado Springs and Vicinity (9.25 x 11.50"), Preliminary Map of the Eastern Base of the Rocky Mountains (10.3 x 47.0"), and Map of the Elk Mountains Colorado (18.3 x 18.0"). The volume is missing the Preliminary Map of Central Colorado by Henry Gannett. Hardbound in brown cloth with gilt tile on spine.

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Condition: B+

The contents are clean with uniform light toning. The Eastern Base of the Rockies map has a couple of small holes in the upper third of the image (B). There is a blank bookplate on the front pastedown, and the covers have light wear with a small piece of tape stuck to the rear board. The map of Central Colorado has a 1" binding tear at left. Text has a hint of toning and covers have light wear.