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[NS7704ZBW], Technical Note, Thomas Alva Edison, April 30th, 1877

Title: [NS7704ZBW], Technical Note, Thomas Alva Edison, April 30th, 1877
Editor's Notes: sexty, 3 items: circuit design (for pat.); fr. 661 undated; circ. diagram for pat. model; relay details
Author: Edison, Thomas Alva
Date: 1877-04-30
Type: Technical Note
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: NS7704-F
Microfilm ID: 7:660
Document ID: NS7704ZBW
URL: https://edisondigital.rutgers.edu/document/NS7704ZBW
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