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[NS7704ZBP1], Technical Note, Thomas Alva Edison, June 21st, 1877

Title: [NS7704ZBP1], Technical Note, Thomas Alva Edison, June 21st, 1877
Author: Edison, Thomas Alva
Date: 1877-06-21
Type: Technical Note
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: NS7704-F
Microfilm ID: 97:586
Document ID: NS7704ZBP1
URL: https://edisondigital.rutgers.edu/document/NS7704ZBP1
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 97
License: CC0 1.0 Universal