A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Signal maintenance on the frisco
Interesting records of primary battery operation on 884 miles of road signaled with semaphores; average cost of maintenance and operation per signal, per month in 1927 was $8.95; details of construction; signal maintenance organization.
Signal maintenance on the frisco
Interesting records of primary battery operation on 884 miles of road signaled with semaphores; average cost of maintenance and operation per signal, per month in 1927 was $8.95; details of construction; signal maintenance organization.
Signal maintenance on the frisco
Ry. Signaling
Railway Signaling ; 21
1928
4 pages
8 Figs.
Article (Journal)
English
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