Twentieth century manual of railway and commercial telegraphy (1905)
Meyer, Frederic Louis, b. 1875 · Chicago, New York, Rand, McNally & Company · leaf 118
ow green to the front and sides, andred to the rear. Ked lights in this position aretermed tail lights. 114 THE TWENTIETH CENTURY Hand, Flag, and Lamp Signals. Hand Signals, MANNER OF USING. INDICATION. Swung across track Stop. Raised and lowered vertically . . Gro ahead. Swung vertically in a…
Telegraph
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