Url https://edisondigital.rutgers.edu/document/NB239070 Resource class dctype:Text Title [NB239070], Technical Note, William Alphonsus Hayes, William De Mille Telfair, May 1919 Creator Hayes, William Alphonsus Telfair, William De Mille Subject Phonograph recordings Sound and acoustics Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1919-05-00 Type Technical Note Identifier NB239070 Source 240:187 Relation Edison Storage Battery Co Rights Thomas Edison National Historical Park Has Version https://archive.org/details/edisonmicrofilm240/page/n197/mode/1up Archive.org Viewer, Microfilm Series Reel 240 Is Part Of NB239-F Uri https://edisondigital.rutgers.edu/document/NB239070 https://edisondigital.rutgers.edu/document/NB239070 --