Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 143,446 pages of information and 230,060 images on early companies, their products and the people who designed and built them.
A suspension bridge built over the Niagara Falls.
The upper deck was used by the railway, with trains limited in speed to 5 miles per hour.
The lower (or wagon-roadway) is regulated so as to prevent marching bodies of men from crossing the bridge "in step".