Url https://edisondigital.rutgers.edu/document/D7804D Resource class dctype:Text Title [D7804D], Letter from J W Kalbaugh to Thomas Alva Edison, March 30th, 1878 Creator Kalbaugh, J W Subject Automatic telegraphy Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1878-03-30 Type Letter Identifier D7804D Source 16:617 Relation Butler, Benjamin Franklin Forney, John Wien Rights Thomas Edison National Historical Park Date Created 1878-03-30 Has Version https://archive.org/details/edisonmicrofilm16/page/n625/mode/1up Archive.org Viewer, Microfilm Series Reel 16 Is Part Of D7804-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7804D https://edisondigital.rutgers.edu/document/D7804D --