Url https://edisondigital.rutgers.edu/document/D7937ZAO Resource class dctype:Text Title [D7937ZAO], Letter from Hamilton McKown Twombly to Thomas Alva Edison, May 14th, 1879 Creator Twombly, Hamilton McKown Subject Carbon, coal, glass, ceramics Telephone Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-05-14 Type Letter Identifier D7937ZAO Source 52:51 Relation Western Electric Co Rights Thomas Edison National Historical Park Date Created 1879-05-14 Has Version https://archive.org/details/edisonmicrofilm52/page/n60/mode/1up Archive.org Viewer, Microfilm Series Reel 52 Is Part Of D7937-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7937ZAO https://edisondigital.rutgers.edu/document/D7937ZAO --