Knox College Railroads in the Midwest: Early Documents and Images (Knox College)
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Chicago, Burlington & ... (6)
Railroad Signals (5)
Railroad Tracks (3)
Railroad Employees (2)
Railroad Signal Towers (2)
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Block signal on the CB&Q in Galva, Illinois
1. Block signal on the CB&Q in Galva, Illinois
Block signal switch and track
2. Block signal switch and track
Block signal: clear train coming
3. Block signal: clear train coming
Block signal: clear train coming, Corning Station
4. Block signal: clear train coming, Corning Station

Block signal: working in tower
5. Block signal: working in tower
Block signal: working outside
6. Block signal: working outside
  

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