Word: filter
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Somehow, perhaps in collusion with Red railway workers, they managed to filter through a police cordon. They cleverly planted Red flags in the hands of the official greeters. When the repatriates' train pulled in, the welcome was transformed into a frenzied Red rally. Bewildered clubwomen stood disconsolately amid unnoticed cups of cold tea as the demonstration swept around them...
...Schmidts mapping project of the entire sky is expected to take four years. Each little patch will be photographed twice: once with a red filter and once with no filter. On the red plates the hot blue stars will appear to lose some of their brightness; the cool red stars will not. By comparing the two plates, astronomers can get some idea of the temperature of the stars that appear on them...
...Polaroid automobile headlights and visors for glareless night driving. But since the superbrilliant lights used in the Polaroid system would require equipping all the 33,225,000 cars on the road at the same time, the system made little headway. Nevertheless, with such new products as the camera and filter screens for television sets, Polaroid is finally in the black and hopes to stay there...
...filter" to neutralize "snow...
...Filter Walls. A building's walls and roof used to be considered mere barriers. They might be decorated on the outside, but their main purpose was to keep the weather out. Modern architects think of a wall as a filter between the outside and inside environments. For example, the wall of a factory in a hot climate should reflect outside heat and absorb inside heat, passing as much of it as possible to the outside. In a cold climate, the wall should gather all possible heat from the sunlight, while keeping inside heat from moving out. Modern materials, such...