Some account and description of Ithiel Town's improvement in the construction and practical execution of bridges, aqueducts and rail road bridges, whether built entirely of wood, or of cast or wrought iron : being intended as a general system of bridge building, over rivers, creeks, harbors, or other places where bridges are necessary ; either with wide openings between the piers or from 200 to 500 feet or with openings of less extent

"Some account and description of Ithiel Town's improvement in the construction and practical execution of bridges, aqueducts and rail road bridges, whether built entirely of wood, or of cast or wrought iron : being intended as a general system of bridge building, over rivers, creeks, harbors, or other places where bridges are necessary ; either with wide openings between the piers or from 200 to 500 feet or with openings of less extent"@en