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[NV14038], Technical Note, Thomas Alva Edison, February 7th, 1878

Title: [NV14038], Technical Note, Thomas Alva Edison, February 7th, 1878
Editor's Notes: Telephones with polarization cell; variable resistance by changing polarization of cell and tries with selenium [TAE invents optical telephone?]
Author: Edison, Thomas Alva
Date: 1878-02-07
Type: Technical Note
Subject: Telephone
Folder ID: NV14-F
Microfilm ID: 4:179
Document ID: NV14038
URL: https://edisondigital.rutgers.edu/document/NV14038
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 4