. Electric railway journal . satisfactorily. The signals consist of a standard semaphore arm and a two-light, double-spectacle casting which acts as a counterweight,mounted on top of a stub pole alongside of the telephone incandescent lamps are mounted between the two sides ofthe spectacle casting and are connected to the trolley in serieswith three other lamps mounted in the telephone booth. Whenthe semaphore arm is in a horizontal position indicating stopthe lights show through a red spectacle and when the arm isdropped to 45 deg., indicating clear, the lights show through agreen s
. Electric railway journal . satisfactorily. The signals consist of a standard semaphore arm and a two-light, double-spectacle casting which acts as a counterweight,mounted on top of a stub pole alongside of the telephone incandescent lamps are mounted between the two sides ofthe spectacle casting and are connected to the trolley in serieswith three other lamps mounted in the telephone booth. Whenthe semaphore arm is in a horizontal position indicating stopthe lights show through a red spectacle and when the arm isdropped to 45 deg., indicating clear, the lights show through agreen spectacle. The absence of a light signal at night due to theburning out of any lamp is a danger indication. The sema-phore arm is mechanically connected to a trip mechanism inthe telephone booth which in turn is operated by a selector relayin circuit with a selector switchboard in the dispatchers single bare copper line wire connects the dispatchers officein Alliance with all of the signal relays and current for op-. Dispatchers Signal at Lake Park erating the signal system is taken from the trolley at the dis-patchers office. The signal mechanism is protected by Arguslightning arresters and individual ground rods are used in pref-erence to grounding to the rail. The normal position of the semaphore arms is clear andthe cars have regular meeting points shown on the timetable,for which no train orders are issued by the dispatcher. Whenit is necessary to fix a new meeting point the dispatcher issuesthe proper orders to the crews of both cars affected and thensets the signal at the new meeting point to stop by energiz-ing the selector relay at that siding and causing the trip to re- March ii, 191 i.] ELECTRIC RAILWAY JOURNAL. 429 lease the signal arm. The crew of the first car to arrive re-ports to the dispatcher by telephone and is warned to wait forthe opposing car, and as soon as the first car is on the siding thesignal arm is restored to clear on orders from the dispat
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