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flame carbon

British  

noun

  1. electrical engineering a carbon electrode containing metallic salts that colour the arc in a flame-arc light

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

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Chlorine and hydrogen combine with a pale violet flame, carbon monoxide burns in oxygen with a blue flame, while ammonia burns with a deep yellow flame.

From An Elementary Study of Chemistry by McPherson, William

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