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[N020047], Technical Note, Charles Batchelor, May 28th, 1879

Title: [N020047], Technical Note, Charles Batchelor, May 28th, 1879
Editor's Notes: chalk tests--use as references for letters
Author: Batchelor, Charles
Date: 1879-05-28
Type: Technical Note
Subject: Metals and minerals; Telephone
Folder ID: N020-F
Microfilm ID: 30:993
Document ID: N020047
URL: https://edisondigital.rutgers.edu/document/N020047
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 30