Url https://edisondigital.rutgers.edu/document/N320041 Resource class dctype:Text Title [N320041] Technical Note, April 21st, 1886 Creator Edison, Thomas Alva Subject Heat and thermodynamics Electricity and magnetism Publisher Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University Date 1886-04-21 Type Technical Note Identifier N320041 Source 43:320 Rights Thomas Edison National Historical Park Date Created 1886-04-21 Has Version https://archive.org/details/edisonmicrofilm43/page/n328/mode/1up Archive.org Viewer, Microfilm Series Reel 43 Is Part Of N320-F Uri https://edisondigital.rutgers.edu/document/N320041 https://edisondigital.rutgers.edu/document/N320041 --