Jablochkoffn.
/ˈjablɒtʃkɒf/ Used attributively and in the possessive to denote an electric arc lamp invented by Jablochkoff (now obsolete) in which carbon rod electrodes were placed side by side and separated by an insulating material such as plaster of Paris, which gradually melted as the electrodes burned away.
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Jablochkoff1877
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1877 Jrnl. Franklin Inst. 104 295 Jablochkoff's electric candles burn for two or three hours without interruption.
1884 J. E. H. Gordon Pract. Treat. Electr. Lighting vii. 99 The lighting of the Avenue de l'Opera in Paris in 1878 by Jablochkoff candles first demonstrated the possibility of street lighting by electricity.
1894 R. M. Walmsley Electr. Current xii. 508 Because of the difference in the rate of burning of the positive and negative carbons in the ordinary arc, the Jablochkoff candle has to be supplied with alternate currents.
1922 S. G. Starling Electr. vi. 85 In that year [sc. 1876] Jablochkoff employed two parallel carbon rods, separated by an insulating material... These were called Jablochkoff's candles. They soon gave place to more convenient arc lamps.
This entry has not yet been fully updated (first published 1976; most recently modified version published online September 2018).
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