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[NS7810A], Technical Note, Charles Batchelor, Thomas Alva Edison, May 1878

Title: [NS7810A], Technical Note, Charles Batchelor, Thomas Alva Edison, May 1878
Editor's Notes: pressure relay prior to June 1 1878; Supplied year and month
Author: Batchelor, Charles; Edison, Thomas Alva
Date: 1878-05-00
Type: Technical Note
Subject: Telegraph
Folder ID: NS7810-F
Microfilm ID: 7:898
Document ID: NS7810A
URL: https://edisondigital.rutgers.edu/document/NS7810A
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