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Scientific American, Vol. 35, No. 10 (September 1876) (1876)
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should be calculated for a movable load of 100 lbs. occupied by Boundary Avenue, a street of 80 feet in width, proper radius. The mode of adjusting the bearing of the per square foot, or 4,000 lbs., per lineal foot, with a factor making with Forbes street, on the center line of the bridge, ribs on… … WEOU0HT IRON BEIDGE AT PITTSBURGH PA. © 1876 SCIENTIFIC AMERICAN, INC.Patents · Improved · Consists · Machine · Cobalt · Iron · Nickel · Scientific American · Apparatus · Sewing machine · Trade catalogs · Horse power · Working men · Breech block · Terrestrial attraction · Surface density · Cash gifts · American supplement
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