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[D7937ZAH], Letter from Bergmann & Co, Sigmund Bergmann to Thomas Alva Edison, May 5th, 1879

Title: [D7937ZAH], Letter from Bergmann & Co, Sigmund Bergmann to Thomas Alva Edison, May 5th, 1879
Editor's Notes: What size button in the tramsmitters now making for you? Use bell or sounder? If bell, what resistance? Marg: "1/4 inch. Want regular telephone with Bell same as you make for G&S only transmitter must have 1/4 button." Reverse marg: "what wld you sell me 60 Induction Coil my size 60 Bells 60 Transmitters 60 Switch 60 Keys-put it low down."
Author: Bergmann & Co; Bergmann, Sigmund
Recipient: Edison, Thomas Alva
Date: 1879-05-05
Type: Letter
Subject: Carbon, coal, glass, ceramics; Telephone
Folder ID: D7937-F
Microfilm ID: 52:43
Document ID: D7937ZAH
URL: https://edisondigital.rutgers.edu/document/D7937ZAH
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 52

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