The economics of petroleum . owever, must be placedthe social importance of kerosene to the farm and rural community;and while the economic pressure of rising price will tend to divertit from this social role, counter forces of a politico-economic naturemay set up adequate defense to save a modicum of supply from utterextinction. CHAPTER XI FUEL OIL In ail economic , fuel oil is the residue left over from the countrys supply of crude petroleum after other demands are satisfied. MILLIONS This product comprises three varieties: Crudeused as such; residuumfuel oil derived mainlyfrom skimmin
The economics of petroleum . owever, must be placedthe social importance of kerosene to the farm and rural community;and while the economic pressure of rising price will tend to divertit from this social role, counter forces of a politico-economic naturemay set up adequate defense to save a modicum of supply from utterextinction. CHAPTER XI FUEL OIL In ail economic , fuel oil is the residue left over from the countrys supply of crude petroleum after other demands are satisfied. MILLIONS This product comprises three varieties: Crudeused as such; residuumfuel oil derived mainlyfrom skimming and top-ping refineries; and dis-tillate fuel oil, or gas oil,turned out chiefly by in-termediate and complete-run refineries. The rela-tive proportions of thesethree types carry consid-eralile significance in re-spect to the future courseof this commodity. Arough approximation ofthe ratio of crude oilused as such to fuel andgas oil is given in Fig. of Mineshas estimated the ratioof distillate fuel oil to. Fig. 68.—The relation between fuel oil, other oilproducts, and crude oil fuel in the United States,1910-1920. residuum fuel oil for the year 1918, as follows: Table 61.—Fuel-oil Supply in 1918 by Types of Fuel Product Millions of Barrels Per Cent of Total Distillate fuel oil, or gas Light residuum fuel oil Heavy residuum fuel oil 19*48164 82171 * The American Gas Association estimates the 1919 output of distillate gas oil to be30 million barrels, as likewise does the Census of Manufactures for 1919. 142 SOURCES OF FUEL OIL 143 ]GAS & FUEL1 OIL AND LOSSES TOTAL OILS RUN TO STILLS = BILLION GALLONS EAST COAST PENN. ETC. ILL. IND. ETC. KAN. OKLA. ETC. It will be observed from these proportions, which have not greatly-changed since 1918, that residuum fuel oil overwhelmingly predom-inates over distillate fuel oil, with the heavy variety of residuum instriking excess of the light. Fig. 68 and the table above emphasizethe residual character of fu
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