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[NS7704ZBT], Technical Note, Charles Batchelor, Thomas Alva Edison, July 7th, 1877

Title: [NS7704ZBT], Technical Note, Charles Batchelor, Thomas Alva Edison, July 7th, 1877
Editor's Notes: quad & sexty, 2pp.: compensation for mag. problems; cross of tubes tongue for pol. relay (use as illustration? -- see Case 142)
Author: Batchelor, Charles; Edison, Thomas Alva
Date: 1877-07-07
Type: Technical Note
Subject: Multiple telegraphy (duplex, quadruplex)
Folder ID: NS7704-F
Microfilm ID: 7:656
Document ID: NS7704ZBT
URL: https://edisondigital.rutgers.edu/document/NS7704ZBT
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