Gasoline

—A volatile distillate from crude petroleum, largely used as a fuel in internal combustion engines. The boiling point of gasoline ranges from 120° to 250° F., with an average range between 149° and 194° F. Its vapor is 3.05 times as heavy as air, and its calorific power is between 18,000 and 20,000 B. T. U. Gasoline is a compound of several spirits of varying density and gravity, being a volatile e ence distilled from petroleum oil. When used as a fuel for internal combustion engines it should have a specific gravity of about.682, or 76°B. Some English authorities recommend spirit having a specific gravity of from.72 to.74, or between 65° and 59°B, virtually what is known in the United States as high-grade benzine. Hydrocarbon spirits of lower degrees on the Baumé scale become increasingly difficult to vaporize.