Robert A. Chesebrough's system of locomotion for elevated railroads. [electronic resource] Patented July 14, 1868. Letter of Gen. Egbert L. Viel-flat, C.E.
Electronic text and image data. Ann Arbor, Mich. : University of Michigan, Digital Library Initiatives, 2000. Includes both TIFF files and keyword searchable text. [Making of America] This volume is made possible by a grant from the Andrew W. Mellon Foundation as part of Making of America IV: the American voice, 1850-1877.
