[N020057], Technical Note, Thomas Alva Edison, June 18th, 1879
https://edisondigital.rutgers.edu/document/N020057
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Title
[N020057], Technical Note, Thomas Alva Edison, June 18th, 1879
Editor's Notes
Record of well ground chalks etc for chemical telephone, Nos. 1-26--again prob use as refs for letters; following these are sketches of experimental telephone arrangements, notes on ways to test chalks, including instructions to Upton that may be related to Upton tests that follow in notes on chalks tested; fr. 1019 Fundamental experiments with various chalks seem to be pressure, wetness, and sound and Upton's tests for resistance and deflection after rubbing?, include those noted above and original designs
Author
Mentioned
Date
1879-06-18
Type
Subject
Folder/Volume ID
N020-F
Microfilm ID
30:997
Document ID
N020057
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University