Hefner lamp
A flame lamp used in photometry that burns amyl acetate and has been used as a standard for measuring luminosity in parts of Europe.
plural of space flight
plural of Interior Alaskan wolf
(colloquial, derogatory) A private security guard, usually one regarded as inferior to and less skilled than a true law enforcement officer.
博物館の資料室には、20世紀初頭に光度計の較正に使われていた酢酸アミルを燃やす炎の標準ランプが埃をかぶって保管されていた。
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