[N137007], Technical Note, Francis Robbins Upton, July 19th, 1880

https://edisondigital.rutgers.edu/document/N137007

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Title

[N137007], Technical Note, Francis Robbins Upton, July 19th, 1880

Editor's Notes

notes on underground conductor resis. "A bucket of tar tried and its resistance found to be extremely high could not easily measure." Fr 490 insulation on Carman's circuit: "all kerite lamp wire, where exposed to earth, are being overlaid with rubber tap ("piping") and served with coal tar, then left exposed to the sun to harden." Recordsd of which lines were cut.

Date

1880-07-19

Folder/Volume ID

N137-F

Microfilm ID

38:489

Document ID

N137007

Publisher

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