[W100DEBB], Legal Testimony, Thomas Alva Edison, June 21st, 1881
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Title
[W100DEBB], Legal Testimony, Thomas Alva Edison, June 21st, 1881
Editor's Notes
"I first employed a pump embodying this invention in substance at my laboratory during the fall of 1878, but using water instead of mercury as the exhaust agent. In March or April 1879 I conceived of the idea of using it with mercury as the exhaust agent. I immediately made drawings thereof, disclosed it to others and within a few days had mercury pumps made embodying the issue. Such pumps have been made and used, as occasion required, continuously and to a large extent to present time."
Author
Mentioned
Date
1881-06-21
Type
Subject
Folder/Volume ID
W100DEB-F
Document ID
W100DEBB
Rights
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University