Url https://edisondigital.rutgers.edu/document/E1518DEP Resource class dctype:Text Title [E1518DEP], Letter from Heyden Chemical Works to Thomas Alva Edison, April 20th, 1915 Creator Heyden Chemical Works Subject Shipping and materials handling Chemicals, chemical products, and chemical processes Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1915-04-20 Type Letter Identifier E1518DEP Source 261:165 Relation McDermott, John Thomas Meadowcroft, William Henry Rights Thomas Edison National Historical Park Date Created 1915-04-20 Has Version https://archive.org/details/edisonmicrofilm261/page/n175/mode/1up Archive.org Viewer, Microfilm Series Reel 261 Is Part Of E1518D-F Recipient Edison, Thomas Alva Uri https://edisondigital.rutgers.edu/document/E1518DEP https://edisondigital.rutgers.edu/document/E1518DEP --