. The street railway review . -. can be adapted perfectly to use on drawbridgesand affords absolute protection. It requires an inter-locking tower on the draw so that the bridge tender con-. JACK KNIFE BRIDGE—METROPOLITAN ELEVATED. (^Mte€ty\aiWay-j^y^^ 15 trols everything. Froni the tower on the draw the elec-tric railway system is controlled as follows. Current issupplied to the approaches through the tower. That 400 to 800 feet back on each approach are sectionsof trolley wire controlled h\ leyers in the tower. Oper-

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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads