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 415
Fig. 31. Home Signal Color—Upper arm Red light at night. Lower arm White light at night. Indication—Diverging route clear, proceed at slow speed. Main route blocked. Day Night
Locomotives
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