Word: cumulus
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Dates: during 1940-1949
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Project Cirrus (a joint cloud study program of the services and G.E.) has been very successful, said Dr. Langmuir. Thirty-five of its cloud-seeding flights changed super cooled clouds* into ice or snow crystals. Last October, at Albuquerque, two large cumulus clouds were sprinkled with dry ice. They turned into a furious thunderstorm that drenched Albuquerque with heavy rain at a time of year when rain is uncommon...
...experiments on the towering cumulus clouds of summer, results were hardly better. Seventy-nine of them got the dry-ice treatment, but only 18 produced any rain; in all cases except five, rain was already falling within 30 miles. Even in these five cases, there was natural rain 40 to 60 miles away...
From his plane window 20 miles off, Radiological Monitor Bradley saw the "huge column of clouds, dense, white, boiling up through the strato-cumulus." The next move in Operation Crossroads was his; and a few minutes later he and his plane were flying toward Bikini Atoll and the "evil mushrooming" column...
Over Jupiter Island, north of Palm Beach on Florida's east coast, a stiff wind was blowing. It rattled the palm trees with a sound like distant machine guns, piled huge stacks of cumulus clouds in front of the sun. From the sea, a salty film of spindrift swept over the cluster of snug beach houses. In one of them last week, sitting intently by his radio, Under Secretary of State Robert Abercrombie Lovett listened to the President's undramatic announcement of a dramatic new turn in U.S. foreign policy...
...recently, Venture decided that maybe he might, after all, offer a miracle. He had read news dispatches about artificial rainmaking in the U.S., resolved to have a go at it. He equipped a Peruvian air force plane with a rubber water tank, personally flew off to sprinkle a fat cumulus cloud over the Andean foothills. Rain fell, but it was in an area where it often rains at this time of year. Next day, Pedro was in the air again, with dry ice, found a cloud over the desert. The dry-ice ejector got stuck...