[D8107E], Letter from James A Campbell to Thomas Alva Edison, January 20th, 1881
https://edisondigital.rutgers.edu/document/D8107E
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Metadata
- Title
- [D8107E], Letter from James A Campbell to Thomas Alva Edison, January 20th, 1881
- Editor's Notes
- About to issue a work on mechanical hearing aids. Want sources for learning about your investigations in this line. Can principles of telephone be applied to defective hearing? Saw in 1878 clipping that Bell predicted possibility of hearing fall of shadow on a section of selenium in telephone circuit; is this true? [Mostly illegible TAE marg]
- Author
- Campbell, James A
- Recipient
- Edison, Thomas Alva
- Mentioned
- Bell, Alexander Graham
- Date
- 1881-01-20
- Type
- Letter
- Folder ID
- D8107-F
- Microfilm ID
- 57:398
- Document ID
- D8107E
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 57