Thomas A. Edison Papers Image Edition · Thomas Edison Papers Digital Edition

[MBSB21181], Letter from Thomas Alva Edison to Telegraphic Journal, March 27th, 1879

Title: [MBSB21181], Letter from Thomas Alva Edison to Telegraphic Journal, March 27th, 1879
Editor's Notes: Letter to ed of Telegraphic Journal. Re earlier article on carbon rheostat. I used several hundred discs of silk saturated with carbon, providing greater range of resistance; "had I merely used powerdered carbon, as in the Clerac tube, it would have been a failure." Also objects to review of Prescott's book. Has numerous drawings of microphones made by amateurs, which resemble carbon telephone. "The ordinary carbon telephone may be adjusted to any degree of delicacy, and when so adjusted is as sensitive as the so-called microphone."
Author: Edison, Thomas Alva
Recipient: Telegraphic Journal
Mentioned: Prescott, George Bartlett
Date: 1879-03-27
Type: Letter
Subject: Carbon, coal, glass, ceramics; Telephone; Incandescent lamp
Folder ID: MBSB2-F
Microfilm ID: 94:481
Document ID: MBSB21181
URL: https://edisondigital.rutgers.edu/document/MBSB21181
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 94

The Thomas A. Edison Papers Digital Edition