Url https://edisondigital.rutgers.edu/document/N021065 Resource class dctype:Text Title [N021065], Technical Note, Thomas Alva Edison, April 9th, 1879 Creator Edison, Thomas Alva Subject Metals and minerals Heat and thermodynamics Electricity and magnetism Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1879-04-09 Type Technical Note Identifier N021065 Source 30:1133 Rights Thomas Edison National Historical Park Date Created 1879-04-09 Has Version https://archive.org/details/edisonmicrofilm30/page/n1142/mode/1up Archive.org Viewer, Microfilm Series Reel 30 Is Part Of N021-F Uri https://edisondigital.rutgers.edu/document/N021065 https://edisondigital.rutgers.edu/document/N021065 --