New York. Sarony, Major & Knapp. [1855.]. Originally folded, now flattened with some tissue strengthening on the reverse, infill of a gap in the middle upper blank margin and extension of blank margin at lower rightto fill binding trim. Minimal fold browning. A very good example. Item #3664
An important early geological map of the state of California appearing in Reports of Explorations and Surveys for a Railroad Route from the Mississippi River to the Pacific Ocean. More specifically, the map was included in William Blake's Report of a Geological Reconnaissance in California. The map, a lithograph with original handcolor identifying nine geological zones, represents the most comprehensive analysis of California's geology completed at the time. When this map was prepared, the geography and toponymy of California was far from settled. For example, the map depicts a rather small Lake Tahoe named "Lake Bonpland," the name Fremont had given the lake in 1844. Marcou & Marcou: Mapoteca Geologica Americana: 678.