Url https://edisondigital.rutgers.edu/document/NV15174 Resource class dctype:Text Title [NV15174], Technical Note, Thomas Alva Edison, August 7th, 1877 Creator Edison, Thomas Alva Subject Acoustic telegraphy Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1877-08-07 Type Technical Note Identifier NV15174 Source 4:477 Rights Thomas Edison National Historical Park Date Created 1877-08-07 Has Version https://archive.org/details/edisonmicrofilm4/page/n485/mode/1up Archive.org Viewer, Microfilm Series Reel 4 Is Part Of NV15-F Uri https://edisondigital.rutgers.edu/document/NV15174 https://edisondigital.rutgers.edu/document/NV15174 --