Url https://edisondigital.rutgers.edu/document/NB244115 Resource class dctype:Text Title [NB244115], Technical Note, Ludwig Fredrick Ott, June 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 1921-06-00 Type Technical Note Identifier NB244115 Source 240:825 Relation Koppers (H.) Co Dougherty, Elmer Ellsworth Dixon (Joseph) Crucible Co Rights Thomas Edison National Historical Park Has Version https://archive.org/details/edisonmicrofilm240/page/n834/mode/1up Archive.org Viewer, Microfilm Series Reel 240 Is Part Of NB244-F Uri https://edisondigital.rutgers.edu/document/NB244115 https://edisondigital.rutgers.edu/document/NB244115 --