Locomotive text for engineers and firemen; a complete treatise on the engine, electric head-light and standard code of train rules (1908)
National correspondence school of railroading, Chicago. [from old catalog] · [Chicago] · leaf 411
Fig. 23.Train Order Signal or Telegraphic Block Signal Color—Green light at night. Indication—Proceed. … Fig. 24.Train Order Signal or Telegraphic Block Signal Color—Red light at night. Indication—Stop. STANDARD CODE OF SIGNALS. 401 Day Nigkt
Locomotives
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