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[D7829ZAU], Letter from M Swan to Thomas Alva Edison, April 6th, 1878

Title: [D7829ZAU], Letter from M Swan to Thomas Alva Edison, April 6th, 1878
Editor's Notes: Does TAE have an invention that will measure the nuber of vibrations of air per second, ie measure sound -- TAE marg: "Yes the phonogrpah will do this when run by clockwork and with a timing pendulum"
Author: Swan, M
Recipient: Edison, Thomas Alva
Date: 1878-04-06
Type: Letter
Subject: Cylinder phonograph; Sound and acoustics
Folder ID: D7829-F
Microfilm ID: 18:976
Document ID: D7829ZAU
URL: https://edisondigital.rutgers.edu/document/D7829ZAU
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 18
License: CC0 1.0 Universal

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