By Herman E. Sheets

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They are drilled with customary rotary I Ocean Resources / 41 drilling equipment in the same manner as oil and gas wells. , carried to the steam horizon. The deepest well is approximately 5000 ft, but the greatest depths have not yielded appreciably larger quantities of steam. The steam is carried in insulated lines about 12 in. in diameter from the wellhead to the power plant and the condensing towers of the chemical plant. In addition to thermal activity under the land areas of the earth, the recent discovery of very high heat-flow characteristics (about six World midocean ridge system.

Applications of this idea have been suggested, and many ex­ periments have been undertaken to try them out. On the widest possible scale, the procedure would involve the opposition, under tropical con­ ditions, of surface water at 82°F as a source of heat and water from well below the surface at perhaps 50°F as a cold source. In the Arctic, the same system could use water from below the surface at 31°F just beneath the ice as a hot source, and the air just above it, which some­ times drops to 76°F below zero, as a cold source.

72 (February 1967). Fig. 12. Fig. 13. I Ocean Ό ►O Resources 30 / John H. Clotworthy to the fisherman of slightly less than $400 million for all the catch, it is quite apparent that not a great deal of money is available for equipment under present conditions, unless that equipment can be proved to increase, immediately and substantially, the total value of catch. In any event, there is little money for speculation. Another interesting aspect is the species that are missing from the top thirteen species of value: squid, the most plentiful food fish in the world, but for which there has been developed no US market; and skate and other ground fish that could be used for the manufacture of palatable fish sticks, if only packagers would create the demand.

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