[D7903ZIV], Letter from Jesse H Bunnell to Thomas Alva Edison, October 13th, 1879
https://edisondigital.rutgers.edu/document/D7903ZIV
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Title
[D7903ZIV], Letter from Jesse H Bunnell to Thomas Alva Edison, October 13th, 1879
Editor's Notes
Briefly describes 5 alternate ways of constructing a circuit through a moving cage to signal its position. [Is this the elevator annnunciator?]
Author
Recipient
Date
1879-10-13
Type
Folder/Volume ID
D7903-F
Microfilm ID
49:420
Document ID
D7903ZIV
Publisher
Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University