Science for beginners . w method. VIII. OUR SUPPLY OF PETROLEUM44. The Rise of the Petroleum Industry.—Petroleum wasfirst produced in commercial quantities in the United States in 1858. In 1860 about 2,000,000bbl. were produced; in 1918 about356,000,000 bbl. were the average the production ofpetroleum in the United States hasdoubled about every eight 18 shows the growth of thepetroleum industry and also showsthe date at which each new fieldwas discovered. 45. The Oil Fields of the Uni-ted States.—The Pennsylvaniafields produced all of the petroleumup to 1886, when the
Science for beginners . w method. VIII. OUR SUPPLY OF PETROLEUM44. The Rise of the Petroleum Industry.—Petroleum wasfirst produced in commercial quantities in the United States in 1858. In 1860 about 2,000,000bbl. were produced; in 1918 about356,000,000 bbl. were the average the production ofpetroleum in the United States hasdoubled about every eight 18 shows the growth of thepetroleum industry and also showsthe date at which each new fieldwas discovered. 45. The Oil Fields of the Uni-ted States.—The Pennsylvaniafields produced all of the petroleumup to 1886, when the Lima, Ohio,field was discovered. The Indi-ana field was discovered in 1897;the Texas field, in 1901; the Califor-nia field, in 1903; the Oklahoma field, in 1905, and the Illinoisfield, in 1906. Figure 19 shows the best known fields of theUnited States. 46. How Long Will Our Supply of Petroleum Last?—Experience has shown that the supply of oil in each field islimited. The Pennsylvania field is now nearly Fig. 17.—Products of pe-troleum when distilled bythe o]d and by the newmethods. ILLUMINATING GAS LIGHTING 39 All the older fields are rapidly falling off in the amount ofoil produced annually. Fortunately, up to the present time,as the older fields began to fail new fields have been discov-ered. It is thought, however, that most of the oil fields of theUnited States are now known. It seems nearly certain thatbefore many years the supply of petroleum in the UnitedStates will be declining. Oil fields of undetermined produc- 8 § c © © © 8 S 3 S S g g 3 ill § I § § § i.
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