[LB006840], Letter from Francis Robbins Upton to H Verschaffel, January 22nd, 1881
https://edisondigital.rutgers.edu/document/LB006840
PDF: Archive.org
CSV: Metadata
Metadata
- Title
- [LB006840], Letter from Francis Robbins Upton to H Verschaffel, January 22nd, 1881
- Editor's Notes
- Mr. Edison has given me your letter of Jan. 3, to answer. To questions asked I reply: 1. Lamps of every desired candle power can be constructed. 2. The cnalde power of any lamp may be changed at will by inroducing resistance into circuit with it. 3. Any number of lamps may be placed in the smae circuit. We have now 575 lamps in one circuit each of sixteen candle power. 4. Lamps of any required intensity may be placed on the same circuit. 5. We obtain about 150 candles fron am indicated horse power and can subdivide this at will. 6. The price of the lamp will probably be about 2 1/2 francs. 7. A machinw which will give 1600 candels in one hundred different places costs about 2500 francs. 8. Lamps last about 400-600 hours. 9. The light is perfectly steady if the source of power is averaging uniform. 10. We do not know. We store, so to speak, electricity by having plenty of power at the station when we manufacture it.
- Author
- Upton, Francis Robbins
- Recipient
- Verschaffel, H
- Mentioned
- Edison, Thomas Alva
- Date
- 1881-01-22
- Type
- Letter
- Folder ID
- LB006-F
- Microfilm ID
- 80:477
- Document ID
- LB006840
- Publisher
- Thomas A. Edison Papers, School of Arts and Sciences, Rutgers University
- Has Version
- Archive.org Viewer, Microfilm Series Reel 80
- Item sets
- [LB006-F] LB-006 (1880-1881)