Word: filtered
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...system, which will soon be familiar to air travelers, is remarkably simple. Twelve powerful lights are arranged in groups of three around the threshold of the runway. In front of each lamp is a filter with a red upper half and a clear lower half. In front of the filter is a two-inch horizontal slit. When an observer is above the center of the beam, the lamp looks white; in the middle it changes to pink, and in the lower half...
Detecting such a test is not impossible either, given the right instruments. On a roof at Los Alamos Scientific Laboratory, six wide-angle lenses stare day and night at the sky. Each is linked to a filter that makes it blind to all light except a special kind that comes from the fluorescence of nitrogen or oxygen. If light of this unusual sort comes down from the sky, the rooftop apparatus at Los Alamos will ring an alarm that will sound around the world. It will mean that some nation has attempted a secret bomb test in space...
...doubt. Weiss and Taylor took samples of different tissues, each containing many kinds of cells, from chick embryos 8 to 14 days old. They minced each sample finely and treated it with enzymes that made its cells separate without killing them. Straining the soupy stuff through a fine nylon filter, they removed all remaining cell clumps. Then they concentrated the isolated, mixed-up cells to a soft mush and deposited specks of it on the saclike "chorio-allantoic" membrane enclosing eight-day-old chick embryos...
Everything about Abo School will have a dual function. Designed for 540 children, it will readily shelter 2,000 persons. Flush with the ground, the 18-in. concrete roof will be a basketball court and a fallout filter. The two wells used for air conditioners can supply emergency drinking water. The lunch room will be stocked with a 14-day food supply, and cupboards throughout the 18-classroom building will contain 970 cots. Abo will also have a two-way radio, underground phone lines, radiation-measuring instruments, provisions for fire fighting, garbage disposal and a morgue...
Most companies also use reconstituted or homogenized tobacco (formerly unusable stems and leaves that are pulverized and re-pressed), which was pioneered by Reynolds and copied by the industry. The average filter cigarette now contains about 14% reconstituted tobacco. Many tobaccomen feel that filters, because they have less flavor and often burn faster, actually make people smoke more...