Explorations and surveys for a rail road route from the Mississippi River to the Pacific Ocean route near the 35th parallel. Map no. 1, From Fort... 

Explorations and surveys for a rail road from the Mississippi River to the Pacific Ocean route near the 35th parallel. Map no. 2, from the Rio Grande... 

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...