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Thomas A. Edison Papers
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Technical Note, Charles Batchelor, September 3rd, 1875
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Domestic Telegraph Co
District and alarm telegraphs (domestic telegraph)
Electric pen and mimeograph
Courtesy of Thomas Edison National Historical Park.
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
“Technical Note, Charles Batchelor, September 3rd, 1875,” Edison Papers Digital Edition, accessed July 18, 2018, http://edison.rutgers.edu/digital/document/MBN001049A.
A project that narrates Edison's life and work through his documents