The gas processing industry west of the Mississippi River began near here in 1909 at the D.W. Franchot & Company Plant three miles west, where liquid hydrocarbons were extracted from gas produced with oil in the surrounding Glenn Pool. Discovered on November 22, 1905, the Glenn Pool provided the raw material for the first gas processing plant. By 1920, 315 plants had been built in Oklahoma. The industry's expansion grew out of conserving liquids contained in natural gas. This natural gasoline, as it was initially called, fueled increasing numbers of automobiles, while residue gas fueled oil field operations and was piped to nearby towns for heating and lighting. With the rapid growth of gas processing in Oklahoma and surrounding oil states, gas processing became a major United States industry. By 1920, natural gas and the products of gas processing constituted 58 percent of the nation's total petroleum energy production. By 1970, Oklahoma plants had processed 30 trillion cubic feet of gas and recovered 1.5 billion barrels of liquids. Within a few years after gas processing had spread to Oklahoma, it spawned two other petroleum-related processing industries: the petrochemical industry and the LP gas, or bottled gas, industry.