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Scientific American, Vol. 97, No. 6 (August 1907) (1907)

leaf 8

An illustration from Scientific American, Vol. 97, No. 6 (August 1907), 1907, leaf 8
with a false conical head, temporarily screwed upon the pin. After the pin is driven home, the head is removed, and the large nut which serves to keep the pin permanently in position is screwed into place. The completed bridge will have a very large capacity for traffic. This will be carried upon… … Of a cessation of this vast "natural soda fountain." Driving Home a 14-Inch by 5-Foot Steel Pin at Intersection. the overall width of the bridge being 88 feet—there will be a roadway 56 feet wide, the central portion of which, 36 feet in width, will be devoted to street and general vehicular…

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