[X163A], Letter from Thomas Alva Edison to George Frederick Barker, December 28th, 1885
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Title
[X163A], Letter from Thomas Alva Edison to George Frederick Barker, December 28th, 1885
Editor's Notes
Notes on and drawing of an acoustic device employing a double wheel; materials include wood, leather rings; rosin; "The rosin'd Leather gave tremendous Longitudinal vibration. Spring S was very heavy so as to permit amplitude so to speak to the Longitudinal movement."
Author
Recipient
Date
1885-12-28
Type
Folder/Volume ID
X163-F
Document ID
X163A
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University