The air firing condition produced a non-luminous flame in the near burner region.
Or something with enough luminous power to start fires and burn your family alive.
More than 60 years later he is still making programmes, with his latest, Life that Glows, about the magical light made by glow worms, fire flies and luminous plankton, to be broadcast on BBC2 on 9 May.
In an early 13th-century portrait of a Buddhist hierarch, or lama, the exquisite agitated field of stylized animals, twining lotus vines and pint-size deities surrounding the central figure is relieved by a kind of visual fire break: a luminous, streamlined proscenium of three streamlined rainbows that suggests the glowing, rounded outline of a big jukebox.
The spectacular and magical light produced by glow worms, fire flies and luminous plankton is what most of us know as bioluminescence - light made by living things.
He adored the strange, luminous element, and called it "cold fire" (kaltes Feuer), or, in a more affectionate mood, "mein Feuer".
He adored the strange, luminous element, and called it "cold fire" (kaltes Feuer), or, in a more affectionate mood, "mein Feuer". Throughout the eighteenth century it was made from bones.
See the painting here 5 Isaac Levitan Summer Evening (1899) It would be hard to think of a more beautiful image of summer evening light turning field to fire than this delicately luminous painting.
Through Uncle Abe, I was drawn into the history of "cold" light luminescence which started perhaps before there was any language to record things, with observations of fireflies and glow-worms and will-o'-the-wisps and luminous seas, and of St. Elmo's fire, the eerie luminous discharges that could stream from a ship's masts, giving its sailors a feeling of bewitchment.
The scene is filmed in black and white but, softly lighted, it has the tender intimacy of Rice's late painting, with its luminous, soaked-in warmth, like a banked fire.
