Url https://edisondigital.rutgers.edu/document/CJ615AEV Resource class dctype:Text Title [CJ615AEV], Letter from William Horatio Mason to Thomas Alva Edison, September 19th, 1907 Creator Mason, William Horatio Subject Testing and quality control Rolls and crushers Cement Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1907-09-19 Type Letter Identifier CJ615AEV Source 203:375 Rights Thomas Edison National Historical Park Date Created 1907-09-19 Has Version https://archive.org/details/edisonmicrofilm203/page/n385/mode/1up Archive.org Viewer, Microfilm Series Reel 203 Is Part Of CJ615-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/CJ615AEV https://edisondigital.rutgers.edu/document/CJ615AEV --