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

https://edisondigital.rutgers.edu/document/D8430U

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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

Date

1884-07-18

Decade

1880-1889

Folder/Volume ID

D8430-F

Microfilm ID

73:538

Document ID

D8430U

Publisher

Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
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