Url https://edisondigital.rutgers.edu/document/NB244137 Resource class dctype:Text Title [NB244137], Technical Note, Ludwig Fredrick Ott, December 15th, 1921 Creator Ott, Ludwig Fredrick Subject Chemicals, chemical products, and chemical processes Disc record and duplicating technology Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1921-12-15 Type Technical Note Identifier NB244137 Source 240:836 Rights Thomas Edison National Historical Park Date Created 1921-12-15 Has Version https://archive.org/details/edisonmicrofilm240/page/n845/mode/1up Archive.org Viewer, Microfilm Series Reel 240 Is Part Of NB244-F Uri https://edisondigital.rutgers.edu/document/NB244137 https://edisondigital.rutgers.edu/document/NB244137 --