[D8123ZDX], Letter from Francis Robbins Upton to Thomas Alva Edison, September 23rd, 1881

https://edisondigital.rutgers.edu/document/D8123ZDX

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Title

[D8123ZDX], Letter from Francis Robbins Upton to Thomas Alva Edison, September 23rd, 1881

Editor's Notes

Thin fall tubes work well so far, but need more testing. Turning out 1100 lamps a day and hopes to get out 5000 by Saturday. Says reject rate of 5% due to bad vacuum seals and breakage of carbons.

Date

1881-09-23

Decade

1880-1889

Type

Folder/Volume ID

D8123-F

Microfilm ID

57:965

Document ID

D8123ZDX

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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