The gas takes up hydrocarbon gases formed in the decomposition of the petroleum oils, which make it burn with a luminous flame.
Thus chalk dust sifted into a non-luminous flame renders it luminous.
If a large supply of gas be turned on and a considerable blast of air sent into the flame, a non-luminous flame of great size will be obtained (Fig.
The same thing will happen in bending a lead glass tube if it is made too hot in a luminous flame.
We require a little lycopodium, a piece of glass tubing one foot long, and about a quarter-inch bore, and the non-luminous flame of the Bunsen burner or a spirit lamp.
In the non-luminous flame, owing to the air being admitted and mixed with the gas, the increased supply of oxygen renders combustion more complete, greatly increases the heat of the flame, but renders it incapable of giving light.
We may accomplish this by passing any very fine particles of carbonaceous matter through a non-luminous flame, and we shall see that whilst these particles pass through the flame it will give light owing to their presence.
The resulting gas when burnt in an ordinary burner gives a luminous flame; it can be used in atmospheric burners differing little from those of the ordinary type.
In the earlier days of this revival, air-gas rich in hydrocarbon vapour was made and was further aerated to give a non-luminous flame by burning it in an atmospheric burner.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "luminous flame" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
