[MBN002033], Technical Note, Thomas Alva Edison, Charles Batchelor, February 12th, 1877

Item

Abstract

Speaking telegraph -- Bell's imperfect - felt better to get variable resistance by the volume of the voice -- made two insts transmitter and receiver and describes them also another plan -- uses black lead -- annotate with other material from TI and notebooks from this month including v. 11:8 [11:226 a Doc] and 3:681, 921, 923

Date

1877-02-12

Decade

1870-1879

Identifier

MBN002033

Folder Set

MBN002

Title

[MBN002033], Technical Note, Thomas Alva Edison, Charles Batchelor, February 12th, 1877

Microfilm ID

90:673

Publisher

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