Url https://edisondigital.rutgers.edu/document/D7903ZGC Resource class dctype:Text Title [D7903ZGC], Letter from Charles Ward Raymond to Thomas Alva Edison, July 31st, 1879 Creator Raymond, Charles Ward Subject Microphone and other acoustic devices Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-07-31 Type Letter Identifier D7903ZGC Source 49:312 Relation Gold and Stock Telegraph Co Scott, George B Rights Thomas Edison National Historical Park Date Created 1879-07-31 Has Version https://archive.org/details/edisonmicrofilm49/page/n320/mode/1up Archive.org Viewer, Microfilm Series Reel 49 Is Part Of D7903-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7903ZGC https://edisondigital.rutgers.edu/document/D7903ZGC --