spans tion of the pier was about $400. way managers as to the meaning of economy as relating to of lattice girders supported by masonry abutments and by The viaduct was constructed under the direction of M. De- the roads they operate. By far the greater number apparent- piers formed of clusters of… … est in the long run ; about an eighth of an VIADUCT ON THE PAEIS AND ORLEANS RAILWAY, PRANCE. that that policy which inch. At the same ) 1870 SCIENTIFIC AMERICAN, INC.
Patents · Iron · Assignor · Antedated · Tin · Chimney · Scientific American · Manufacture · Large number · Century plant · Henry carey · Ten times · Sulphuric acid · Steam engine · Antedated february · Wrought iron · Trade catalogs
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