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

[NS7802G], Technical Note, John Kruesi, Thomas Alva Edison, June 22nd, 1878

Title: [NS7802G], Technical Note, John Kruesi, Thomas Alva Edison, June 22nd, 1878
Editor's Notes: auriphone for the deaf (helmholz resonater ear trumpets) -- magnaphone
Author: Kruesi, John; Edison, Thomas Alva
Date: 1878-06-22
Type: Technical Note
Subject: Microphone and other acoustic devices
Folder ID: NS7802-F
Microfilm ID: 7:762
Document ID: NS7802G
URL: https://edisondigital.rutgers.edu/document/NS7802G
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 7
License: CC0 1.0 Universal