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Scientific American, Vol. 64, No. 20 (1891) (1891)
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propose making | Near this point Broadway and Seventh Avenue cross what appearance the ground in the vicinity of the the same change. Then, by bringing associated lines|each other at an acute angle. Diverging slightly to sae cross section presented when excavated. The under the system, the street… … © 1891 SCIENTIFIC AMERICAN, INC.Internet Archive · Public domain (published before 1931). Free to use for anything.
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