Working With Signal and Switch Control Relays
by Chicago and North Western Historical Society
Title
Working With Signal and Switch Control Relays
Artist
Chicago and North Western Historical Society
Medium
Photograph - B/w Photography
Description
A worker holds a controlling relay. Switch and signal relays allowed dispatchers to help trains run smoothly from miles away. Photo courtesy of Chicago & North Western Railway Archives.
Uploaded
April 25th, 2015
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Viewed 113 Times - Last Visitor from New York, NY on 04/25/2024 at 9:35 AM
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