Url https://edisondigital.rutgers.edu/document/CJ614ADW Resource class dctype:Text Title [CJ614ADW], Letter from William Horatio Mason to Thomas Alva Edison, December 20th, 1906 Creator Mason, William Horatio Subject Production difficulties and adjustments Rolls and crushers Cement Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1906-12-20 Type Letter Identifier CJ614ADW Source 203:172 Rights Thomas Edison National Historical Park Date Created 1906-12-20 Has Version https://archive.org/details/edisonmicrofilm203/page/n181/mode/1up Archive.org Viewer, Microfilm Series Reel 203 Is Part Of CJ614-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/CJ614ADW https://edisondigital.rutgers.edu/document/CJ614ADW --