Url https://edisondigital.rutgers.edu/document/NB244128A Resource class dctype:Text Title [NB244128A], Technical Note, Ludwig Fredrick Ott, September 30th, 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 1921-09-30 Type Technical Note Identifier NB244128A Source 240:831 Relation Hoffman, Archibald David Rights Thomas Edison National Historical Park Date Created 1921-09-30 Has Version https://archive.org/details/edisonmicrofilm240/page/n840/mode/1up Archive.org Viewer, Microfilm Series Reel 240 Is Part Of NB244-F Uri https://edisondigital.rutgers.edu/document/NB244128A https://edisondigital.rutgers.edu/document/NB244128A --