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[NV08349], Technical Note, Edward Hibberd Johnson, Thomas Alva Edison, August 17th, 1876

Title: [NV08349], Technical Note, Edward Hibberd Johnson, Thomas Alva Edison, August 17th, 1876
Editor's Notes: Expts on diff porous substances to replace paper in EMG; It is evident the Electro Moto Action is due entirely to the solution-- It only requires a solid to hold it"; among those tried is chalk and pyrogallic and says as "As good as paper-- God conductor at same time admits of motograph action holding solution well-- chalk not being of itself a conductor--allows the solution to perform that function alone" -- ends with "Chalk is best so far"
Author: Johnson, Edward Hibberd; Edison, Thomas Alva
Date: 1876-08-17
Type: Technical Note
Subject: Electromotograph; Chemistry
Folder ID: NV08-F
Microfilm ID: 3:779
Document ID: NV08349
URL: https://edisondigital.rutgers.edu/document/NV08349
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 3

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