[N326001], Technical Note, Ezra Torrance Gilliland, August 25th, 1886
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Title
[N326001], Technical Note, Ezra Torrance Gilliland, August 25th, 1886
Editor's Notes
notes by Gilliland: "Silicon in the L[ong] D[istance] transmitter #1 shows very high resistance, first test got no results-- measures 1800 ohms-- Heated the silica on short iron pan to dry it and burn off any organic matter that may have been in it and get a better result. With four cups carbon battery it talks about 1/3 to 1/2 as loud as a hand telephone-- measured 10,000 ohms= Ore pyrites in No 1 l.D. talks about 1/2 as good as carbon-- washed it in nitric acid improved it a very little measured [left space] ohms-- Antimony in #1 LD produced very little results about 1/2 as good as a hand telephone Resistance very low about .01 ohms. Alloy of antimony potas Talks about as loud as a hand telephone Resistance very high-- Cocoa nut Carbon-- on first test seems to work better than regular anthracite carbon it is much lighter than anthracite carbon and instrument has [better microphone?] microphonic qualities
Author
Mentioned
Date
1886-08-25
Type
Subject
Folder/Volume ID
N326-F
Microfilm ID
43:810
Document ID
N326001
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University