[D8430V], Letter from Edison Lamp Co to Thomas Alva Edison, July 21st, 1884
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Title
[D8430V], Letter from Edison Lamp Co to Thomas Alva Edison, July 21st, 1884
Editor's Notes
The calculations of life on Swan lamps, sent you in our memorandum of July 18, were made from the law derived from experiments on our own lamps: viz. The life varies inversely as the 365[?] power of the candle-power. The fact that the life calculated from the 20 c.p lamps, is so different from that calculated from the 60 c.p. lamps, would seem to show, as you say, taht the Swan lamps do not follow the same law, as to candle-power and life, as ours do. TAE marg: E
Author
Recipient
Mentioned
Date
1884-07-21
Type
Folder/Volume ID
D8430-F
Microfilm ID
73:539
Document ID
D8430V
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University