Url https://edisondigital.rutgers.edu/document/D7903ZFF1 Resource class dctype:Text Title [D7903ZFF1], Letter from Emil Henke to Thomas Alva Edison, July 7th, 1879 Creator Henke, Emil Subject Metals and minerals Telephone Ore exploration and mining Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-07-07 Type Letter Identifier D7903ZFF1 Source 49:278 Rights Thomas Edison National Historical Park Date Created 1879-07-07 Has Version https://archive.org/details/edisonmicrofilm49/page/n286/mode/1up Archive.org Viewer, Microfilm Series Reel 49 Is Part Of D7903-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7903ZFF1 https://edisondigital.rutgers.edu/document/D7903ZFF1 --