Url https://edisondigital.rutgers.edu/document/E1949AF Resource class dctype:Text Title [E1949AF], Letter from Alexander Roys, National Tin Corp to Thomas Alva Edison, September 24th, 1919 Creator National Tin Corp Roys, Alexander Subject Ore milling and separation Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1919-09-24 Type Letter Identifier E1949AF Source 272:815 Relation Engineering and Mining Journal Rights Thomas Edison National Historical Park Date Created 1919-09-24 Has Version https://archive.org/details/edisonmicrofilm272/page/n825/mode/1up Archive.org Viewer, Microfilm Series Reel 272 Is Part Of E1949-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/E1949AF https://edisondigital.rutgers.edu/document/E1949AF --