[D8403S], Letter from W R Edelen to Thomas Alva Edison, February 4th, 1884

Item

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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."

URL

https://edisondigital.rutgers.edu/document/D8403S

Author

Edelen, W R

Recipient

Edison, Thomas Alva

Date

1884-02-04

Decade

1880-1889

Type

Letter

Subject

Patent assignments, licenses, and royalties
Vacuum and glass bulb

Identifier

D8403S

Folder Set

D8403-F

Microfilm ID

71:54

Rights

Thomas Edison National Historical Park

Publisher

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

Item sets

(D-84-03) Edison, T.A.