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

https://edisondigital.rutgers.edu/document/NV08349

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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"

Date

1876-08-17

Decade

1870-1879

Folder/Volume ID

NV08-F

Microfilm ID

3:779

Document ID

NV08349

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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