Url https://edisondigital.rutgers.edu/document/NA216 Resource class dctype:Text Title [NA216] Technical Note, 1909-1910 Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1909-1910 Type Technical Note Identifier NA216 Source 174:404 Rights Thomas Edison National Historical Park Has Version https://archive.org/details/edisonmicrofilm174/page/n413/mode/1up Archive.org Viewer, Microfilm Series Reel 174 Is Part Of NA216-F Uri https://edisondigital.rutgers.edu/document/NA216 https://edisondigital.rutgers.edu/document/NA216 --