. Electric railway review . hat, using thesteam jets, for each unit generated, pounds of coal and30 pounds of water were consumed. With induced draft theresults were pounds of coal and 28 pounds of water perunit of current. In this case 1,800 gallons of water weresimply evaporated for use by the steam jets. The net savingin this case worked out at 14*4 per cent. 810 ELECTRIC RAILWAY REVIEW Vol. XVII, No. 25. RAVENSWOOD EXTENSION OF THE NORTHWESTERNELEVATED RAILROAD. On May 18, 1907, the Northwestern Elevated RailroadCompany began operating trains to Ravenswood, one of thenorthern subur
. Electric railway review . hat, using thesteam jets, for each unit generated, pounds of coal and30 pounds of water were consumed. With induced draft theresults were pounds of coal and 28 pounds of water perunit of current. In this case 1,800 gallons of water weresimply evaporated for use by the steam jets. The net savingin this case worked out at 14*4 per cent. 810 ELECTRIC RAILWAY REVIEW Vol. XVII, No. 25. RAVENSWOOD EXTENSION OF THE NORTHWESTERNELEVATED RAILROAD. On May 18, 1907, the Northwestern Elevated RailroadCompany began operating trains to Ravenswood, one of thenorthern suburbs of-Chicago. This service was made possibleby the completion of a new elevated structure connecting pansion bent is provided between towers. The tracks of theChicago & Northwestern Railway and also those of the Chi-cago Milwaukee & St. Paul Railway are crossed on 80-footthrough girder spans, supporting the elevated tracks 33 feetabove those of the steam roads. The maximum grade of the tracks is iy2 per cent, which. Ravenswood Extension of the Northwestern Elevated—Plate GirderThrough Span over Chicago Milwaukee & St. Paul Railway. Ravenswood Extension of the Northwestern Elevated—StandardConstruction Showing Longitudinal Bracing. with the original line at Clark and Roscoe streets in Chicagoand extending west 3% miles, to join there a new surface line1% miles long terminating in Ravenswood. Both local andexpress service are given. Details of new structure supports two tracks throughout its occurs at the crossing over the Chicago & Northwesterntracks. About 8,800 tons of open-hearth bridge steel were was specified that this material should have an ultimatetensile strength of 28 to 32 tons, and an elastic limit of notless than tons per square inch. The steel was first givena shop coat of Lowe Brothers red lead lute paint and then
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectstreetr, bookyear1906
