Reports, specifications, and estimates of public works in the United States of America : comprising the Philadelphia gas works ; reservoir dam across the Swatara ; twin locks on the Schuylkill Canal ; Delaware Breakwater ; Philadelphia Water Works ; dam and lock on the Sandy and Beaver Canal ; dam on the James River and Kanawha Canal, Virginia ; locks of eight feet lift, on the same aqueducts across Rivanna River and Byrd Creek, on the same ; superstructure, etc., of farm bridges, on the same ; lock gates and mitre sills /