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[N020137], Technical Note, Charles Batchelor, Thomas Alva Edison, February 28th, 1879

Title: [N020137], Technical Note, Charles Batchelor, Thomas Alva Edison, February 28th, 1879
Editor's Notes: These telephone drawings may be related to getting ready for Tel Interferences -- "go to page 155" for drawing labeled "Thermo telephone" subject of alloy tables?; motograph telephone made by Ott, condenser telephone, resistance telephone, these and others similar to those from 1877; fr. 1040 carbon button in a ring shellacked on rim
Author: Batchelor, Charles; Edison, Thomas Alva
Date: 1879-02-28
Type: Technical Note
Subject: Carbon, coal, glass, ceramics; Telephone
Folder ID: N020-F
Microfilm ID: 30:1036
Document ID: N020137
URL: https://edisondigital.rutgers.edu/document/N020137
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 30
License: CC0 1.0 Universal

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