[MBSB21181], Letter from Thomas Alva Edison to Telegraphic Journal, March 27th, 1879
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Title
[MBSB21181], Letter from Thomas Alva Edison to Telegraphic Journal, March 27th, 1879
Editor's Notes
Letter to ed of Telegraphic Journal. Re earlier article on carbon rheostat. I used several hundred discs of silk saturated with carbon, providing greater range of resistance; "had I merely used powerdered carbon, as in the Clerac tube, it would have been a failure." Also objects to review of Prescott's book. Has numerous drawings of microphones made by amateurs, which resemble carbon telephone. "The ordinary carbon telephone may be adjusted to any degree of delicacy, and when so adjusted is as sensitive as the so-called microphone."
Author
Recipient
Mentioned
Date
1879-03-27
Type
Folder/Volume ID
MBSB2-F
Microfilm ID
94:481
Document ID
MBSB21181
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University