Url https://edisondigital.rutgers.edu/document/NP081 Resource class dctype:Text Title [NP081], Technical Note, Thomas Alva Edison, April 28th, 1919 Creator Edison, Thomas Alva Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1919-04-28 Type Technical Note Identifier NP081 Source 178:516 Rights Thomas Edison National Historical Park Date Created 1919-04-28 Has Version https://archive.org/details/edisonmicrofilm178/page/n539/mode/1up Archive.org Viewer, Microfilm Series Reel 178 Is Part Of NP081-F Uri https://edisondigital.rutgers.edu/document/NP081 https://edisondigital.rutgers.edu/document/NP081 --