Url https://edisondigital.rutgers.edu/document/MBN001059 Resource class dctype:Text Title [MBN001059], Technical Note, Charles Batchelor, November 18th, 1876 Creator Batchelor, Charles Subject Miscellaneous technologies Microphone and other acoustic devices Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1876-11-18 Type Technical Note Identifier MBN001059 Source 90:644 Rights Thomas Edison National Historical Park Date Created 1876-11-18 Has Version https://archive.org/details/edisonmicrofilm90/page/n654/mode/1up Archive.org Viewer, Microfilm Series Reel 90 Is Part Of MBN001-F Uri https://edisondigital.rutgers.edu/document/MBN001059 https://edisondigital.rutgers.edu/document/MBN001059 --