[LB008050], Letter from Thomas Alva Edison to Francis Robbins Upton, March 11th, 1881
https://edisondigital.rutgers.edu/document/LB008050
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Title
[LB008050], Letter from Thomas Alva Edison to Francis Robbins Upton, March 11th, 1881
Editor's Notes
I want for lighting up our Office here one hundred lamps with new small sockets which have no more than two volt [variation?] with high vacuum so that the vacuum will not break down. These should be here by Thursday next or Friday. Can you do this? [P.S.] Memo. Would it not be well when you are getting a curve of copper plate lamps to test their economy at the tstart and then make a test of the economy after five hours burning to see if the vacuum has been knowcked down. I suppose your plan of brining the lamps up high on hte pumps will prevent this. But it would be well to prove the fact.
Author
Recipient
Date
1881-03-11
Type
Folder/Volume ID
LB008-F
Microfilm ID
80:861
Document ID
LB008050
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University