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[D7840ZBV], Letter from L A Ludwig to Stockton L Griffin, August 24th, 1878

Title: [D7840ZBV], Letter from L A Ludwig to Stockton L Griffin, August 24th, 1878
Editor's Notes: Wants carbon button -- made microphone by using battery carbon but doesn't transmit voice except as tone and wants to see what will happen with button
Author: Ludwig, L A
Recipient: Griffin, Stockton L
Date: 1878-08-24
Type: Letter
Subject: Carbon, coal, glass, ceramics; Microphone and other acoustic devices
Folder ID: D7840-F
Microfilm ID: 19:900
Document ID: D7840ZBV
URL: https://edisondigital.rutgers.edu/document/D7840ZBV
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 19