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[D8430U], Test Report, Edison Lamp Co, John Trumbull Marshall, July 18th, 1884

Title: [D8430U], Test Report, Edison Lamp Co, John Trumbull Marshall, July 18th, 1884
Editor's Notes: Column 1 shows life of 10 Swan lamps at 160 candles per HP, calculated from a curve of 10 lamps set up 20 candles and giving 226 candles per HP. Column 2 shows life of 10 Swan lamps at 160 candles per HP calculated from a curve of 10 lamps set up at 60 candles and giving 446 candles per HP. [table follows] TAE marg: Why the life so different with the same invoice of lamps & calculated set p at same candle power. This seems to show that treated lamps last longer at high cp than normal while untreated is just opposite
Author: Edison Lamp Co; Marshall, John Trumbull
Mentioned: Edison, Thomas Alva
Date: 1884-07-18
Type: Test Report
Subject: Testing and quality control; Incandescent lamp
Folder ID: D8430-F
Microfilm ID: 73:538
Document ID: D8430U
URL: https://edisondigital.rutgers.edu/document/D8430U
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 73

Item sets: [D8430-F] (D-84-30) Electric Light -- Edison Lamp Co -- Lamp Test Reports

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