Url https://edisondigital.rutgers.edu/document/D7829ZAG Resource class dctype:Text Title [D7829ZAG], Letter from Clarence J Blake to Thomas Alva Edison, March 23rd, 1878 Creator Blake, Clarence J Subject Cylinder phonograph Sound and acoustics Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1878-03-23 Type Letter Identifier D7829ZAG Source 18:957 Rights Thomas Edison National Historical Park Date Created 1878-03-23 Has Version https://archive.org/details/edisonmicrofilm18/page/n965/mode/1up Archive.org Viewer, Microfilm Series Reel 18 Is Part Of D7829-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/D7829ZAG https://edisondigital.rutgers.edu/document/D7829ZAG --