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[N086027], Technical Note, Charles Batchelor, September 18th, 1879

Title: [N086027], Technical Note, Charles Batchelor, September 18th, 1879
Editor's Notes: chalk solutions for buttons then tested and results; then 5 pair old formula and more testing
Author: Batchelor, Charles
Date: 1879-09-18
Type: Technical Note
Subject: Metals and minerals; Telephone
Folder ID: N086-F
Microfilm ID: 35:932
Document ID: N086027
URL: https://edisondigital.rutgers.edu/document/N086027
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
License: CC0 1.0 Universal
Has Version: Archive.org Viewer, Microfilm Series Reel 35