[D8220ZBE], Letter from B Hempstead to Thomas Alva Edison, December 26th, 1882
https://edisondigital.rutgers.edu/document/D8220ZBE
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Title
[D8220ZBE], Letter from B Hempstead to Thomas Alva Edison, December 26th, 1882
Editor's Notes
"What is the least battery force for one of your incandescent lamps, it to be lighted at the distance of a mile form the electric source." This is for flashing the light for signal purposes.
Author
Recipient
Date
1882-12-26
Type
Folder/Volume ID
D8220-F
Microfilm ID
60:833
Document ID
D8220ZBE
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University