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Scientific American, Vol. 75, No. 10 (1896) (1896)
leaf 7
r four tracks, side by side. cident to this plan, such as the fre- The two-track subway is 24 feet wide, quent grade crossings of the streets The latter will vertical and horizontal, each one of 6 feet chord, and of versed sine of about 9 inches. Diagonal struts connect It is proposed to have the… … arches both © 1896 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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