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United States Pacific Railroad Expeditions and Surveys

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Geological Sections of the Bernardino Pass explored by Lieut. R.S. Williamson, Corps Topl. Engrs. in 1853.
Geological Sections of the Bernardino Pass explored by Lieut. R.S. Williamson, Corps Topl. Engrs. in 1853.

Geological map of the route explored by Capt. Jno. Pope, Corps of Topl. Engrs. near the 32nd parallel of north latitude, 1854, from the Red River to the Rio Grande
Geological map of the route explored by Capt. Jno. Pope, Corps of Topl. Engrs. near the 32nd parallel of north latitude, 1854, from the Red River to the Rio Grande

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.

Geological section from the Mississippi River to the Pacific Ocean : along the route explored by Lieut. A.W. Whipple, Corp. of Topl. Engrs. near the parallel of 35 north latitude, 1853-1854.
Geological section from the Mississippi River to the Pacific Ocean : along the route explored by Lieut. A.W. Whipple, Corp. of Topl. Engrs. near the parallel of 35 north latitude, 1853-1854.

Botanical profile representing the forest trees along the route explored by Lieut. A.W. Whipple, Corps of Topl. Engrs. near the parallel of 35° north latitude, 1853-1854 : from Fort Smith to San Pedro
Botanical profile representing the forest trees along the route explored by Lieut. A.W. Whipple, Corps of Topl. Engrs. near the parallel of 35° north latitude, 1853-1854 : from Fort Smith to San Pedro

Profiles from Explorations and Surveys made under the direction of the Hon. Jefferson Davis Secretary of War. No. 1 Route near the 41st parallel; from Ft. Bridger to Ft. Reading by Capt. E.G. Beckwith, 3d. Artillery. No. 2 Route near the 38th & 39th parallel; from Westport to Sevier River.
Profiles from Explorations and Surveys made under the direction of the Hon. Jefferson Davis Secretary of War. No. 1 Route near the 41st parallel; from Ft. Bridger to Ft. Reading by Capt. E.G. Beckwith, 3d. Artillery. No. 2 Route near the 38th & 39th parallel; from Westport to Sevier River.

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 of the Sierra Nevada at the Tejon Pass
Geological Section of the Sierra Nevada at the Tejon Pass