Thomas A. Edison Papers Image Edition · Thomas Edison Papers Digital Edition

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

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.
Author: Upton, Francis Robbins
Recipient: Edison, Thomas Alva
Date: 1881-09-23
Type: Letter
Subject: Production difficulties and adjustments
Folder ID: D8123-F
Microfilm ID: 57:965
Document ID: D8123ZDX
URL: https://edisondigital.rutgers.edu/document/D8123ZDX
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
Has Version: Archive.org Viewer, Microfilm Series Reel 57

Item sets: [D8123-F] (D-81-23) Electric Light -- Edison Electric Lamp Co -- General

The Thomas A. Edison Papers Digital Edition