Word: clouded
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Dates: during 1950-1959
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...best, involving a hasty scrawl on a mimeographed ballot before one settles down to supper; and today's promises to be no more exciting. But with as important a measure as the Re-evaluation Report coming before the College, the Council would have done well to dispel the cloud of apathy surrounding its proposed revamping. For it will take two-thirds of the ballots cast to get an improved Student Council...
...Cloud Five about it, but isn't it possible to have your fancy caught for a moment by a man who annually can add $1 million and 3,000 employees to his company, even though his management policy would be downright boring to trustbusters and muckrakers...
...problem was how to heat the droplets differentially. Dr. van Straten solved it with carbon black, which is a fluffy kind of soot whose intensely black particles, about 500.00 in diameter, accumulate radiant heat just like a blacktop road. When these particles are released in a cloud, she reasoned, the water droplets that capture one or more of them should grow warmer by absorbing sunlight, and should lose their moisture by evaporation to droplets that have stayed comparatively cool because they have captured no particles. Then the cool, fattened-up droplets should fall slowly through the cloud, growing gradually bigger...
...actual fact, the Navy announced last week. It was tested last July over the coast of Georgia. The usual tactic was to attach a package of 1-2 Ibs. of carbon black to a static line and toss it out of an airplane flying through the top of a cloud. When the slack snapped out of the line, the package broke open, releasing the carbon black. Seven clouds out of seven tested dissipated entirely in 2½ to 20 minutes...
When carbon black is released in moist, cloudless air the effect is opposite but no less magical. Its black particles catch sunlight and heat the air between them. The heated air rises, expands and grows colder. Some of its moisture condenses, and a new, white cloud appears in the sky. This system will not form clouds in dry air, but when the air is moist enough, it works almost every time. The official Navy attitude is that the action of carbon black is "an interesting effect" that will have to be studied a great deal more before...