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[NS7704ZCO], Technical Note, James Adams, Thomas Alva Edison, April 12th, 1877

Title: [NS7704ZCO], Technical Note, James Adams, Thomas Alva Edison, April 12th, 1877
Editor's Notes: Sexty increase and decrease (and I quote Keith:) "impossibly" multiple lever; I think rawhide on a ssmall platina diaphragm would be best thing for EMGraph with acoustic
Author: Adams, James; Edison, Thomas Alva
Date: 1877-04-12
Type: Technical Note
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: NS7704-F
Microfilm ID: 7:709
Document ID: NS7704ZCO
URL: https://edisondigital.rutgers.edu/document/NS7704ZCO
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