Critical Points of Ignition

Issue 18 and Volume 51.

Critical Points of Ignition PH. D. When chemical union of substances takes place with sufficient energy to develop heat and light, the process is called combustion. In a restricted sense, combustion is understood to mean the union of any substance with oxygen with the evolution of heat and light, but the term is used in this article to mean the chemical union of such substances. The temperature at which this union occurs is known as the kindling, or ignition temperature, which is dependent upon the kind of material involved, the condition of the material, the pressure, etc. An inspection of a candle, oil or gas flame will show three principal regions. The interior region is dark and consists of cold gas, the next region is where oxygen is being united with the gas—the luminous part. I he third is the oxidizing region, the hottest part of the flames. The tongues…

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