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[NV11057], Technical Note, Thomas Alva Edison, April 10th, 1877

Title: [NV11057], Technical Note, Thomas Alva Edison, April 10th, 1877
Editor's Notes: TI dup, spkg telgh wkg by pressure relay principle
Author: Edison, Thomas Alva
Date: 1877-04-10
Type: Technical Note
Subject: Telephone
Folder ID: NV11-F
Microfilm ID: 3:937
Document ID: NV11057
URL: https://edisondigital.rutgers.edu/document/NV11057
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