| 释义 |
carcel|ˈkɑːsəl|
[f. proper name of inventor, a Frenchman, early in 19th c.]
1. carcel-lamp, a lamp in which the oil is pumped up to the wick by clockwork. Called also the French or mechanical lamp.
1845Mechanic's Mag. xliii. 402 One of the most deserving of notice is the improved carcel lamp. c1865Letheby in Circ. Sc. I. 105/1 Colza oil is generally consumed in the Carcel or French lamp. 1881M. E. Braddon Asph. v. 60 In the bright white light of the carcel lamps.
2. A French unit of illumination, equal to the light emitted by a standard carcel lamp burning 42 grammes of colza-oil an hour and with a flame 40 millimetres in height. (Disused.)
a1884Knight Dict. Mech. Suppl., Carcel-bec, the French unit of illumination. Given the preference over candle⁓power..at the Electrical Congress, in Paris, 1881. 1884F. Krohn tr. Glaser de Cew's Magn. & Dyn.-Electr. Mach. 119 The expenditure of work per second per Carcel-burner (7·4 candle power)... An illuminating power of 1·40 Carcels (10·36 candles). 1902Encycl. Brit. XXX. 260/2 The values are expressed in carcels (9·5 candles) per square centimetre of the mean horizontal focal plane of the luminous source. |