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[D8125B1], Letter from William Joseph Hammer to Thomas Alva Edison, June 1881

Title: [D8125B1], Letter from William Joseph Hammer to Thomas Alva Edison, June 1881
Editor's Notes: Results of Order 285; set of 10 regulars burning at 16 candles; have been going for 652 hours, but two have failed, 1st at 560 min. 2nd at 10,442 min. Order 356; set of 10 A lamps have been going for 162 hours; two failed, 1st at 2250 min. 2nd at 3855 min.; Supplied month
Author: Hammer, William Joseph
Recipient: Edison, Thomas Alva
Date: 1881-06-00
Type: Letter
Subject: Testing and quality control; Incandescent lamp
Folder ID: D8125-F
Microfilm ID: 57:1099
Document ID: D8125B1
URL: https://edisondigital.rutgers.edu/document/D8125B1
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: [D8125-F] (D-81-25) Electric Light -- Edison Electric Lamp Co -- Lamp Test Reports

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