[N080001], Technical Note, Thomas Alva Edison, June 12th, 1879
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Title
[N080001], Technical Note, Thomas Alva Edison, June 12th, 1879
Editor's Notes
Experiments on chemical telephone, connections transmitting end and discussion also notes a bug; problem of polarization with 2 chalks expts on this problem; fr. 494 "We propose to do away with the switch & ring the bell through the coil by our little multiple battery, New buttons listed and test results, fr. 496 "It is probable that every solution will requrie a different polarizing current, chalks seems to require 3/4 or 1/2 Daniel, salt 1/20 of a Daniel roughly speaking"; finds common salt best also sulphate baryta first class
Author
Date
1879-06-12
Type
Subject
Folder/Volume ID
N080-F
Microfilm ID
35:485
Document ID
N080001
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University