Public domain
Chicago, Illinois. Hump master in a Chicago and Northwestern 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
From the collection of Library of Congress. Free to download, adapt and use — no permission needed.
Credit lineChicago, Illinois. Hump master in a Chicago and Northwestern Railroad yard operating a signal switch system which extends the length of the hump track. He is thus able to control movements of locomoti. 1942-01-01. Delano, Jack. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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![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.](https://thumbs.arkivism.com/loc-2017878008.jpg)
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.
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