Mining. A blue flame glowing faintly above the ordinary flame of a candle or lamp when firedamp (flammable gas) is present; cf. cap, n.1 11c. Obsolete…
| 单词 | θ72340 |
| 释义 | the world > matter > properties of materials > temperature > heat > burning > fire or flame > [noun] > flame or blaze > a flame > blue, showing fire-damp (3) show1817 Mining. A blue flame glowing faintly above the ordinary flame of a candle or lamp when firedamp (flammable gas) is present; cf. cap, n.1 11c. Obsolete… blue cap1838 A bluish layer in a flame; spec. (Mining) a circle of bluish flame appearing above and around the wick of a safety lamp, indicating the presence of… cap1877 (Also blue cap.) In coal-mining: a circle of bluish flame appearing above and around the wick of a safety lamp when a dangerous quantity of… |
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