. The science of railways . should be used. Where good hard burnt•icks cannot be secured and a first-class pave-ent must be laid granite or trap blocks should) used. SIGNALS.* The method of signaling to adopt will dependi the amount of traffic and number of trains,light business can be handled by signals dis-ayed at telegraph offices indicating clear tracka stop required for train orders; such signalse operated by hand by the operator from the&ce. Fig. 198 represents a style of this there are a number of fast trains someitomatic system should be resorted to; in thisse the power to o
. The science of railways . should be used. Where good hard burnt•icks cannot be secured and a first-class pave-ent must be laid granite or trap blocks should) used. SIGNALS.* The method of signaling to adopt will dependi the amount of traffic and number of trains,light business can be handled by signals dis-ayed at telegraph offices indicating clear tracka stop required for train orders; such signalse operated by hand by the operator from the&ce. Fig. 198 represents a style of this there are a number of fast trains someitomatic system should be resorted to; in thisse the power to operate the signals is obtainedDm electric batteries and the circuits are openedd closed by the passing trains. Fig. 199 illus-ites the signal used—a white disc indicates theick is clear to the next signal or block, a rede indicates the train has not yet reached thext signal or block. Fig. 200 shows the lever *The subject of signaling is fully treated in the volume,rain Service, 288 BUILDING jIND HEPMRING
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1900
