[D8332V], Letter from Francis Robbins Upton to Thomas Alva Edison, February 7th, 1883

Item

Abstract

Haven't yet done life test on twisted fiber lamp. Tests on Swan lamps showed that at 64 volts varied fr 55 to 95 cp. "Their economy at such candle power make it so high as to prevent their use, at such a volt." "The Swiss order makes the future look extremely rosy. 10.000 @ 50 cts = $5000 One weeks work easy."

Date

1883-02-07

Decade

1880-1889

Type

Identifier

D8332V

Folder Set

D8332

Title

[D8332V], Letter from Francis Robbins Upton to Thomas Alva Edison, February 7th, 1883

Microfilm ID

67:151

Publisher

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

Timestamp

February 7, 1883