The economics of petroleum . s of the EastCoast, of Oklahoma-Kansas, of Texas-Louisi-ana, and of Californiarepresent the dominantsources of this the Californiaoutput to one side,since the Far West andexports consume thefuel-oil of that state,the oil fuel available tothe rest of the LTnitedStates is seen to bederived almost entirelyfrom refineries on theEast Coast and in the south-central portion of the country. The rapid development ofthe oil-fields of the Mid-Continent, the Gulf Coast, and Mexicois directly responsible for this grouping of production, sincecrude petroleum has
The economics of petroleum . s of the EastCoast, of Oklahoma-Kansas, of Texas-Louisi-ana, and of Californiarepresent the dominantsources of this the Californiaoutput to one side,since the Far West andexports consume thefuel-oil of that state,the oil fuel available tothe rest of the LTnitedStates is seen to bederived almost entirelyfrom refineries on theEast Coast and in the south-central portion of the country. The rapid development ofthe oil-fields of the Mid-Continent, the Gulf Coast, and Mexicois directly responsible for this grouping of production, sincecrude petroleum has thereby been made available in advanceof the higher types of requirements and in consequence themajor portion has been forced to find an outlet for the time beingin the only available direction—as steam raising fuel in competitionwith coal. This outcome has also been accentuated by the growingprominence of heavy^ asphaltic crudes in the countrys supply, atype of raw material ill adapted to yielding at once high percentages. ETC, CALIF. ! 1 1 1 T lO 20 30 40 50 60 70 80 90 1003FIGURES IN RECTANGLES ARE MILLIONS OF GALLONS Fig. 69.—The production of gas and fuel oilcompared with the production of other petro-leum products in various parts of the UnitedStates in 1920. 144 FUEL OIL of the more desirable oil products by means of the technology devel-oped for treating the lighter oils. To a notable degree, fuel oil is theaccompaniment of oil-field development in advance of adjustmentsin demands and in refining technology. The output and percentage yield (with reference to the totalvolume of oil distilled) of fuel and gas oil ^ in the various refinerydistricts of the United States for 1918, 1919, and 1920 are shown inthe following table: Table 62. -Production axd Percentage Yield of Fuel and Gas Oil in theUnited States by Refinery Districts, 1918-1920 Refinery District 1918 1919 ? 1920 Produc- Per Cent Produc- Per Cent Produc- Per Cent tion, of Total tion, of Total tion
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