[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.

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
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