Url https://edisondigital.rutgers.edu/document/E1902AJ Resource class dctype:Text Title [E1902AJ], Letter from Walter Halfin to Thomas Alva Edison, April 21st, 1919 Creator Halfin, Walter Subject Newspapers, books, other publications Mechanics Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1919-04-21 Type Letter Identifier E1902AJ Source 271:18 Relation Scientific American Smithsonian Institution Abbot, Charles Greeley Rights Thomas Edison National Historical Park Date Created 1919-04-21 Has Version https://archive.org/details/edisonmicrofilm271/page/n29/mode/1up Archive.org Viewer, Microfilm Series Reel 271 Is Part Of E1902-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/E1902AJ https://edisondigital.rutgers.edu/document/E1902AJ --