DictionaryWels'bach burn"erPronunciation: (welz'bak, -bäk; Ger. vels'bäkh), [key] Trademark. a brand of gaslight consisting essentially of a Bunsen burner on which an incombustible mantle (Wels'bach man"tle) composed of thoria and some ceria becomes brilliantly incandescent when exposed to flame. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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