[X163A], Letter from Thomas Alva Edison to George Frederick Barker, December 28th, 1885

Item

Abstract

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."

Date

1885-12-28

Decade

1880-1889

Type

Identifier

X163A

Folder Set

X163

Title

[X163A], Letter from Thomas Alva Edison to George Frederick Barker, December 28th, 1885

Microfilm ID

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University

Timestamp

December 28, 1885