Zimmermann, Erich Walter, 1888- · New York, Prentice-Hall · leaf 220
s bound to grow rapidly. What about the supply? The worlds petroleum reserve.—Our estimated unre-covered underground reserve of about six and one-halfbillion barrels, as now available, is far less impressivewhen we realize how fast we are using it up, and thatwhile we have burned and wasted less… … O > c O I—I td in O c ow en c H o r o 198 OCEAN SHIPPING one hundred years, we have apparently used up 40 percent, of our available oil supply in only sixty years. A glance at the map shows that outside of the UnitedStates the great oil supplies of the earth, so far as nowknown, are mainly…
Merchant marine · Ships and shipping
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