Hump master in a Chicago and Northwestern [i.e. North Western] railroad yard operating a signal switch system which extends the length of the hump track. He is thus able to control movements of locomotives pushing the train over the hump from his post at the hump office; Chicago, Ill.
World North and Central America United States Illinois Cook Melrose Park
Pixel Dimensions (W x H) : 6012x4517
File Size : 79,560kb