. Electric railway journal . Hamburg Way—Steel and Concrete Flat-Roof Section city and also where cars are switched to the carhouseand shops. The inner tracks are continued partly toswitch trains back to the city and partly to give a two-track route to the carhouse and shops. At the right ofthis illustration will be noted the catenary constructionof the Hamburg-Blankenese-Ohlsdorf single-phase same illustration also shows some semaphores of theHamburg semi-automatic signal system. The general construction of this signal system is thesame as that used on all steam lines of the Pruss
. Electric railway journal . Hamburg Way—Steel and Concrete Flat-Roof Section city and also where cars are switched to the carhouseand shops. The inner tracks are continued partly toswitch trains back to the city and partly to give a two-track route to the carhouse and shops. At the right ofthis illustration will be noted the catenary constructionof the Hamburg-Blankenese-Ohlsdorf single-phase same illustration also shows some semaphores of theHamburg semi-automatic signal system. The general construction of this signal system is thesame as that used on all steam lines of the Prussian StateRailways. The principle is semi-automatic. Within oneblock section only one train is permitted so that only onesignal can be moved if the train has passed a rail contactbehind the following signal. For the purpose of adapt-ing this system to high-speed railways and very densetraffic, the Siemens & Halske company made the apparatussemi-automatic. All that the authorized station operator. Hamburg Way—Arched Subway Entrance does is to push a button, whereupon he can leave the appa-ratus because the other movements are perfectly auto-matic. These operations do not require more time than astandard automatic system, while they embody the addi-tional advantage that the signals are under the permanentcontrol of specially instructed platform men. No tracktrips are used for stopping trains. OPERATING METHODS OF THE BUREAU OF SAFETYOF THE MIDDLE WEST UTILITIES COMPANY In an item published in the Electric Railway Journalof March 1, 1913, brief mention was made regarding theplans and purposes of the bureau of safety which hasbeen organized by the Middle West Utilities Company toact in an advisory capacity relative to its various sub-sidiaries. The work of this bureau is described in the fol-lowing paragraphs: Previous to the organization of the safety bureau theMiddle West Utilities Company decided to handle its ownfire and liability insurance under a trust agreement. Lia-bilit
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