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United States Pacific Railroad Expeditions and Surveys

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Sections of the Colorado Desert explored by Lieut. R.S. Williamson, Corps Topl. Engrs. in 1853.
Sections of the Colorado Desert explored by Lieut. R.S. Williamson, Corps Topl. Engrs. in 1853.

Isothermal chart of the region north of the 36th Parallel &c. &c. between the Atlantic & Pacific oceans; compiled under the direction of Isaac I. Stevens, Govnr. of Washington Territory.
Isothermal chart of the region north of the 36th Parallel &c. &c. between the Atlantic & Pacific oceans; compiled under the direction of Isaac I. Stevens, Govnr. of Washington Territory.

No. 2. Geological plan and section from the Rio Grande to the Pimas Villages Along the Route Explored by Lt. John G. Parke, Corps of Topl. Engrs. near the Parallele of 32 north latitude. 1856.
No. 2. Geological plan and section from the Rio Grande to the Pimas Villages Along the Route Explored by Lt. John G. Parke, Corps of Topl. Engrs. near the Parallele of 32 north latitude. 1856.

Routes near the 47th and 49th parallels ; profiles from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War.
Routes near the 47th and 49th parallels ; profiles from explorations and surveys made under the direction of the Hon. Jefferson Davis, Secretary of War.

Routes near the 47th and 49th Parallels. Milk R. To the Crossing of the Columbia R. From Explorations & Surveys made under the Direction of the Hon. Jefferson Davis, Secretary of War.
Routes near the 47th and 49th Parallels. Milk R. To the Crossing of the Columbia R. From Explorations & Surveys made under the Direction of the Hon. Jefferson Davis, Secretary of War.

Geological Section from the Colorado River to the Pacific Ocean
Geological Section from the Colorado River to the Pacific Ocean

Geological Section of the Coast Mountains and Sierra Nevada from San Francisco to the Great Basin
Geological Section of the Coast Mountains and Sierra Nevada from San Francisco to the Great Basin