[D8403S], Letter from W R Edelen to Thomas Alva Edison, February 4th, 1884
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Title
[D8403S], Letter from W R Edelen to Thomas Alva Edison, February 4th, 1884
Editor's Notes
[interesting TAE marg on lamp life] Has invention for producing high vac. Also wants date, hour, and place of TAE's birth. TAE marg: "We now use a pump that will reduce the pressure to 1/50 millionth of an atmosphere that costs but [7.50] made of glass. We do not find the lamps last any longer at a very high exhaustion."
Author
Recipient
Date
1884-02-04
Type
Folder/Volume ID
D8403-F
Microfilm ID
71:54
Document ID
D8403S
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University