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Knox College Railroads in the Midwest: Early Documents and Images (Knox College)
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Subject
Chicago, Burlington & ... (4)
Railroad Signals (3)
Railroad Signal Towers (2)
Railroad Employees (2)
Railroad Stations (1)
Railroad Tracks (1)
Railroad Locomotives (1)

Creator
Green, Allen A. (4)

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Block signal: clear train coming
1. Block signal: clear train coming
Block signal: clear train coming, Corning Station
2. Block signal: clear train coming, Corning Station
Block signal: working in tower
3. Block signal: working in tower
Block signal: working outside
4. Block signal: working outside
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