[D7903ZKS], Letter from James West Roosevelt to Thomas Alva Edison, November 14th, 1879

Item

Abstract

Microphone and Bell teleph used in unsuccessful expts on human heartbeat; would like to try TAE carbon transmitter & emg receiver. Marg: can borrow but don't think motograph suited for this.

Date

1879-11-14

Decade

1870-1879

Type

Identifier

D7903ZKS

Folder Set

D7903

Title

[D7903ZKS], Letter from James West Roosevelt to Thomas Alva Edison, November 14th, 1879

Microfilm ID

49:502

Publisher

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