. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . JI niii iitri uimxH 2\Uju SI, II li I !11| iiiiiriiiui II H 11 linIL__(inififP ! liii^? Iff. EMPIRE BUILDING. 73 BRO.\DWAY.(Souvenir Post Card Co.) The rate of air discharged when thefans are all working is about 1,120,000cubic feet per minute, and as there is19,000,000 cu. ft. of air in the subway be-tween the Bridge and 59th street, theair in that portion of the tunnel canbe renewed in 17 minutes and the 452 RAILWAY AND LOCOMOTIVE ENGINEERING October, iyo6. 7,800,000 cu. ft. between 59th st
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . JI niii iitri uimxH 2\Uju SI, II li I !11| iiiiiriiiui II H 11 linIL__(inififP ! liii^? Iff. EMPIRE BUILDING. 73 BRO.\DWAY.(Souvenir Post Card Co.) The rate of air discharged when thefans are all working is about 1,120,000cubic feet per minute, and as there is19,000,000 cu. ft. of air in the subway be-tween the Bridge and 59th street, theair in that portion of the tunnel canbe renewed in 17 minutes and the 452 RAILWAY AND LOCOMOTIVE ENGINEERING October, iyo6. 7,800,000 cu. ft. between 59th street and96th street, can be driven out by thepiston-like action of the trains, inabout 25 minutes. To gain some idea of what thesevolumes of air w-ould be like, if piledup in masses above ground,* we may re-fer to two well known on what has been aptly calledthe canyon of lower Broadway inNew York. The Trinity buildingstands approximately 290 ft. abovestreet level, it is about 262 ft. deep andhas an average width of 45 ft. Thecubic contents of this building is there-fore 3,419,100 cu. ft. Its near neigh-bor, the Empire building, rises to aheight of about 300 ft. above
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
