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Scientific American, Vol. 32, No. 5 (January 1875) (1875)

leaf 4

An illustration from Scientific American, Vol. 32, No. 5 (January 1875), 1875, leaf 4
the axis of the circular arches, of 10 feet span and 5 feet rise, and 20 inches from 10 to 12 feet deep, good bottom being found without north archway of the bridge, into which it opens through a, thick, which span the sidewalks, and one elliptical arch, 30 going below the water level. From this… … Fig. 21.-THE UNDERGROUND RAILWAY, NEW YORK CITY.-SIDE ELEVATION OF VIADUCT AT STREET CROSSINGS. © 1875 SCIENTIFIC AMERICAN, INC

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