[NV14005], Technical Note, Thomas Alva Edison, Charles Batchelor, January 6th, 1878

Item

Abstract

Model No. 3 four diaphragm speaker w/polarizing magnet for diaphragms using weird diaphragms maybe [modification of Bell]; also pp. 6, 8

Date

1878-01-06

Decade

1870-1879

Subject

Identifier

NV14005

Folder Set

NV14

Title

[NV14005], Technical Note, Thomas Alva Edison, Charles Batchelor, January 6th, 1878

Microfilm ID

4:154

Publisher

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