[D8430U], Test Report, Edison Lamp Co, John Trumbull Marshall, July 18th, 1884
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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
Mentioned
Date
1884-07-18
Type
Folder/Volume ID
D8430-F
Microfilm ID
73:538
Document ID
D8430U
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University