. Operation of trains and station work and telegraphy . Fig. 19. of the dispatcher in cutting out his transmitter circuitwhile receiving, thus eliminating any noises that his trans-mitter might pick up. 598 TELEPHONES IN RAILROAD WORK If for any reason the dispatcher takes his receiver fromhis head he can be signalled, as a hand generator is fur-nished at each sub-station and a bell is bridged acrossthe two line wires at the dispatchers desk. In Fig. 21this bell is Fig. 20.

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroa, bookyear1919