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[NV18014] Technical Note, October 2nd, 1878

Title: [NV18014] Technical Note, October 2nd, 1878
Editor's Notes: air draft cools platina & alters the resistance--platinum spiral shown in mouthpiece; also see NV14159 (4:317)
Author: Batchelor, Charles; Edison, Thomas Alva
Date: 1878-10-02
Type: Technical Note
Subject: Telephone
Folder ID: NV18-F
Microfilm ID: 4:1057
Document ID: NV18014
URL: https://edisondigital.rutgers.edu/document/NV18014
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 4