Circular Curves for Railroads (1851) Civil Engineer's Pocket-book, 1871 (1904 edition prepared by J. C. Trautwine III) References Sources: Huntingfield Map Collection, Maryland State Archive, MSA SC 1399 -1-658 External links Bio at Philadelphia Buildings https://web.archive.org/web/20050221065816/http://www.picturehistory.com/find/p/20642/g/1/mcms.html (photo) "Guide to the Trautwine Family Papers, 1834-1947" held at Cornell University Architects from Philadelphia 1810 births 1883 deaths American civil engineers American engineering writers 19th-century American architects Engineers from Pennsylvania