Photograph of the Colis P. Huntington, a Southern Pacific Railroad locomotive, 1875. The steam engine is at center and is facing the right. It has a large flared smokestack at right, and the engineer's cab is at left. There is a single, large, piston driven wheel at center with tow smaller wheels at right and two more at left. A triangular cow catcher is affixed to the front of the locomotive. There is a man in a vaquero costume standing on palm fronds by the entrance to the engine. A white adobe building with an American flag in front is in the background at right.