[D8503ZAL], Letter from Ezra Torrance Gilliland to Thomas Alva Edison, April 27th, 1885
https://edisondigital.rutgers.edu/document/D8503ZAL
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Metadata
- Title
- [D8503ZAL], Letter from Ezra Torrance Gilliland to Thomas Alva Edison, April 27th, 1885
- Editor's Notes
- Enclose figures showing the curvature of the earth, it is about .571 feet (7 inches) for one mile. The table enclosed shows what they would have to do for long-distance telegraphing by induction to work. Would need very good wire (probably the best of steel) for it to work. Enclsoures are included, first is a chart and diagram of necessary elevation of each station for certain distances between stations; second gives rule/equation for finding the curvature of the earth.
- Author
- Gilliland, Ezra Torrance
- Recipient
- Edison, Thomas Alva
- Date
- 1885-04-27
- Type
- Letter
- Folder ID
- D8503-F
- Microfilm ID
- 77:84
- Document ID
- D8503ZAL
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- License
- CC0 1.0 Universal
- Has Version
- Archive.org Viewer, Microfilm Series Reel 77