Page from Scientific American Supplement, No. 399, from July 1, 1882. The page details the ventilation of a railroad tunnel under the city of St. Louis by a large vertical shaft.
A schematic of Interlocking 38 B showing the lines of Southern Pacific and the Galveston, Houston, and Houston Railroad Company (GH&H). By end of 1960, ownership of the GH&H was vested in the Missouri Pacific Railroad Company and the Missouri-Kansas-Texas Railroad Company as successors to the original owners.
Southern Pacific snow shed drawings and related information for the construction of Southern Pacific's snow sheds in the Central Sierra in the late nineteenth and early twentieth centuries. Included are changes to certain of the specifications after inspection of construction of the snow sheds. The original designs, field inspections, and modifications were conducted by Southern Pacific engineering staff headquartered at Sacramento, California.