[D8430Q], Letter from Francis Robbins Upton to Thomas Alva Edison, April 22nd, 1884
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Title
[D8430Q], Letter from Francis Robbins Upton to Thomas Alva Edison, April 22nd, 1884
Editor's Notes
In reply to TAE's of 15th inst. I submit the following table proposed bhy Howell. 500 lamps burned at constant pressure and giving an average life of 600 hours would probably break as follows. The lamps being renewed as broken. [Table of Total Hours run and Total Lamps broken, with comments follows]
Author
Recipient
Mentioned
Date
1884-04-22
Type
Folder/Volume ID
D8430-F
Microfilm ID
73:534
Document ID
D8430Q
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University