Url https://edisondigital.rutgers.edu/document/NV15135 Resource class dctype:Text Title [NV15135], Technical Note, James Adams, Thomas Alva Edison, July 27th, 1876 Creator Adams, James Edison, Thomas Alva Subject Multiple telegraphy (duplex, quadruplex) Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1876-07-27 Type Technical Note Identifier NV15135 Source 4:442 Rights Thomas Edison National Historical Park Date Created 1876-07-27 Has Version https://archive.org/details/edisonmicrofilm4/page/n450/mode/1up Archive.org Viewer, Microfilm Series Reel 4 Is Part Of NV15-F Uri https://edisondigital.rutgers.edu/document/NV15135 https://edisondigital.rutgers.edu/document/NV15135 --