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See also: cárcel
carcel (plural carcels)
- (historical) A former unit to measure the intensity of light, approximately 9.74 candelas
1901, Charles King, Ray's Daughter:
- They would surely have heard of it, and now he was here, still virtually in hiding and possibly in disguise, and one unguarded word of hers might land him a prisoner, a war-time deserter, within the walls of the gloomy carcel in Old Manila.
1896, Various, Scientific American Supplement, No. 1082, September 26, 1896:
- In all systems of lighting, save electricity, the unit of light is the carcel.
1888, Various, Scientific American Supplement, No. 664, September 22,1888:
- When experimenting in Paris with a No. 3 lamp in a vertical direction, it showed a consumption of 34.6 liters (1.2 cubic feet) per carcel obtained.
1885, Various, Scientific American Supplement, No. 488, May 9, 1885:
- Desroziers in a series of experiments obtained as much as 250 carcel spherical luminous value per horse-power; this characteristic is one likely to be of great value in electric lighting by incandescence of high intensity.