Drummond light (n.)youdaoicibaDictYouDict[Drummond light 词源字典]
"torch that burns calcium oxide (lime) and gives off intense white light," 1854, named for Scottish engineer Capt. Thomas Drummond, R.E., (1797-1840), who invented it c. 1825.[Drummond light etymology, Drummond light origin, 英语词源]