. Electric railway gazette . FIG. 3.—MAIN SUPPLY PUMPS. duits, but it is believed that the terra cotta will prove farmore substantial and more desirable in every respect. The manholes are located at each square and are of anelliptical shape, three feet by five feet and six feet indepth. This form was followed for the reason that in theestimation of the chief engineer it would make the construc-tion much stronger than if a rectangular shape had beenadopted. One course of brick is found to be sufficient forthe walls, while two would have been necessary to with-. CX^J^IJZrjr^uZLJOS. FIG. 4.—SECTI
. Electric railway gazette . FIG. 3.—MAIN SUPPLY PUMPS. duits, but it is believed that the terra cotta will prove farmore substantial and more desirable in every respect. The manholes are located at each square and are of anelliptical shape, three feet by five feet and six feet indepth. This form was followed for the reason that in theestimation of the chief engineer it would make the construc-tion much stronger than if a rectangular shape had beenadopted. One course of brick is found to be sufficient forthe walls, while two would have been necessary to with-. CX^J^IJZrjr^uZLJOS. FIG. 4.—SECTION OF ROADBED SHOWING MANHOLES AND FEED CONNECTIONS stand the strain if the ordinary shape had been every third manhole a feeder is carried through abranch conduit to the base of a side pole and extendsthrough its centre to the ornamental cap where it passesoutside and enters the bottom of a special terminal boxwhere connection with the trolley wire is made. Thisarrangement is shown in detail in Fig. 5. The construction work on the Haddington & FairmountPark Railway which the company has recently acquired will be completed in about two weeks. For the presentthis line will be operated from the present power plant, buteventually a new engine and a new generator will be addedto meet the demand for increased power. The terminal box is made of one-inch oak, its dimensionsbeing about six by eight inches, and is bolted to the polejust below the cap. The feed cable coming from thebranch conduit, as it has already been described, entersthe bas
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishernewyo, bookyear1895
