direction a comprehensive scheme of subways was laid out, and the portion of it room, one cannot but feel that, whatever advan- stowing projecting roof for protecting workmen while blasting out a projecting reef of rocks. tages of an economical kind the steam turbine which is now in operation… … The crankpins measure 18 a- speed of 45 miles an These caissons, 45 feet wide, 45 feet deep, and 106^6 feet long, the largest ever constructed, are built of reinforced .concrete. They provide a inches by 18 inches, and hour between stations, and double-deck system which eliminates dangerous'…
Feet · York · Steel · Dam · City · Construction · Scientific American · Railroad · Heart throbs · Water Supply · York city · Rapid transit · Long island · Total length · Hudson river · York central · Terminal Station
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