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[D7941ZKN], Letter from Edward Hibberd Johnson to Thomas Alva Edison, December 29th, 1879

Title: [D7941ZKN], Letter from Edward Hibberd Johnson to Thomas Alva Edison, December 29th, 1879
Editor's Notes: Waterhouse wants dates of TAE's steps inventing carbon trans & other dates re microphones. Also needs transmitter made in accordance with 1877 pat. What does "pressure" mean in spec? Barton thinks TAE's use of "pressure" dissimilar from Hughes' "contact." Needs to demonstrate how trans actually works, not just theory. How about getting original insts which Adams gave to Preece?
Author: Johnson, Edward Hibberd
Recipient: Edison, Thomas Alva
Mentioned: Hughes, William H T; Preece, William Henry
Date: 1879-12-29
Type: Letter
Subject: Patent application; Carbon, coal, glass, ceramics; Telephone
Folder ID: D7941-F
Microfilm ID: 52:1031
Document ID: D7941ZKN
URL: https://edisondigital.rutgers.edu/document/D7941ZKN
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
License: CC0 1.0 Universal
Has Version: Archive.org Viewer, Microfilm Series Reel 52

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