. Operation of trains and station work and telegraphy . FIG. 103. A TRAIN-ORDER SIGNAL. Two forms of signals are shown in Figures 104 and105 which are capable of three positions. The upwardinclination of the arm which is shown in Figure 104indicates caution, whereas the downward inclinationshown in Figure 105 indicates the same signal, but it 380 RULES FOR MOVEMENT OF TRAINS cannot be confused with clear because that signal isindicated by the vertical FIG. 104. A THREE-POSITION SIGNAL. ST0P-H0RIZ0NTAL;CAUTION-UP; PROCEEDS-DOWN.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadtrains, booky