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

Item

Abstract

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

Decade

1880-1889

Identifier

N137007

Folder Set

N137

Title

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

Microfilm ID

38:489

Publisher

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