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[D8123ZFL], Letter from Francis Robbins Upton to Thomas Alva Edison, November 25th, 1881

Title: [D8123ZFL], Letter from Francis Robbins Upton to Thomas Alva Edison, November 25th, 1881
Editor's Notes: Wants TAE to come up and make experiments on spirals. Thinks that 13 or 14 lamps per hp at 16 candles is possible. For isolated systems, 75 ohms is enough and this results in greater economy.
Author: Upton, Francis Robbins
Recipient: Edison, Thomas Alva
Date: 1881-11-25
Type: Letter
Subject: Testing and quality control
Folder ID: D8123-F
Microfilm ID: 57:1009
Document ID: D8123ZFL
URL: https://edisondigital.rutgers.edu/document/D8123ZFL
Rights: Thomas Edison National Historical Park
Publisher: Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
License: CC0 1.0 Universal
Has Version: Archive.org Viewer, Microfilm Series Reel 57

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

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