[N319233], Technical Note, Thomas Alva Edison, April 21st, 1886

Item

Abstract

drawing "Phonoplex Short cktg phone partially to weaken outgoing signals & also to only use battery while sending a dot or dash"; p. 234 drawings phonoplex; p. 235 drawing "Phonoplex Copy"; pp, 236-58 phonoplex drawings some dated

Date

1886-04-21

Decade

1880-1889

Identifier

N319233

Folder Set

N319

Title

[N319233], Technical Note, Thomas Alva Edison, April 21st, 1886

Microfilm ID

43:279

Publisher

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

Item sets