After visits to South Africa, Australia, and India to study dry-land deposits, it has become very evident to the writer that most of the earth is covered with water, and also that a ship is the most tantalizing of all modes of travel for a geologist, since captains have a prejudice against anything of geological interest, such as rocks or reefs or shoals. After 1,200 miles of sheltered voyaging behind the great Australian barrier, one may reach Java without ever seeing a coral reef at close quarters. Except the oozes dredged from the deep sea and the contours of its bottom revealed by soundings, the three-quarters of the globe beneath the ocean have scarcely any message for the geologist. That the waves and the tides do important geological work is true, but to hear the growl of the breakers and to see them pounce on their prey, one must . . .

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