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[D8405O], Letter from F R Campbell to Thomas Alva Edison, November 10th, 1884

Title: [D8405O], Letter from F R Campbell to Thomas Alva Edison, November 10th, 1884
Editor's Notes: Would like information re: TAE's microphone - will try to use it to diagnose diseases in the chest. [TAE marg: It cant be used for the purpose you name it has been tried but does not give true results E]
Author: Campbell, F R
Recipient: Edison, Thomas Alva
Date: 1884-11-10
Type: Letter
Subject: Microphone and other acoustic devices
Folder ID: D8405-F
Microfilm ID: 71:414
Document ID: D8405O
URL: https://edisondigital.rutgers.edu/document/D8405O
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 71
License: CC0 1.0 Universal

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