Url https://edisondigital.rutgers.edu/document/D7903ZFN Resource class dctype:Text Title [D7903ZFN], Letter from Neil McCallum to Thomas Alva Edison, July 18th, 1879 Creator McCallum, Neil Subject Miscellaneous technologies Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-07-18 Type Letter Identifier D7903ZFN Source 49:293 Rights Thomas Edison National Historical Park Date Created 1879-07-18 Has Version https://archive.org/details/edisonmicrofilm49/page/n301/mode/1up Archive.org Viewer, Microfilm Series Reel 49 Is Part Of D7903-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7903ZFN https://edisondigital.rutgers.edu/document/D7903ZFN --