The upper Oxidising Flame at consists of the non-luminous tip of the flame.
The older surgeons even supposed that luminous wounds were more apt to heal properly than non-luminous ones.
In the solar system, the luminous matter is collected into the body of the sun; the non-luminous matter, into the planets.
It occurs only in luminous, not in non-luminous animals, and is found in all parts of the mantle, especially the siphons.
On igniting the gas, with the holes of the Bunsen open, we shall see that it burns with a non-luminous but exceedingly hot flame.
Barium salts, when brought into a non-luminous flame, burn with a yellowish-green colour.
We have next to examine what proportion the non-luminous rays of the electric light bear to the luminous ones.
According to Tyndall, 90% of the radiation from the electric arc is non-luminous.
The sky was clear, there was still a crystalline, non-luminous light in the under air.
Not so, it may be saidwe know that non-luminous suns actually exist.
luminous lu·mi·nous (lōō'mə-nəs)
Emitting light, especially emitting self-generated light.