Word: filtered
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...year-old son of Jorgen Jensen, chief navigator of the Scandinavian Airlines System, the instrument described in Skalk sounded much like the twilight compass used by his father on flights at high latitudes, where the magnetic compass is unreliable. The twilight compass is equipped with a Polaroid filter that enables a navigator to locate the position of the sun-even when it is behind clouds or below the horizon-by the sunlight polarized by the atmosphere...
...observation, Jensen passed it on to Ramskou, who immediately recognized its scientific implication. Enlisting the aid of Denmark's royal-court jeweler, the archaeologist collected minerals found in Scandinavia whose molecules are all aligned parallel to each other, just as the crystals are in a Polaroid filter. Ramskou found that one of these minerals, a transparent crystal called cordierite, turned from yellow to dark blue whenever its natural molecular alignment was held at right angles to the plane of polarized light from the sun. Thus, he reasoned, a Viking could have located the sun by rotating a chunk...
Surgery is not strictly a matter of cutting into patients and cutting something out. The A.M.A. last week heard about a new operation designed not to cut out but to filter out the tiny parasites that cause schistosomiasis, a disease that is rapidly displacing malaria as mankind's greatest scourge in tropical regions...
...reasoned that when a patient is cut open to have his spleen removed, he might as well be rid of the flukes at the same time. They designed a system of tubes to pipe the blood from the vein entering the patient's liver, pumping it through a filter, and returning it to a vein in the leg (see diagram). In order to lure the flukes out of their customary lairs in the intestinal veins, they give patients a single injection of tartar emetic. The flukes, which find the emetic as unpleasant as most human beings do, come scurrying...
...dramatize the importance of auto care, Getty provided specifics. "A single faulty spark plug," he wrote, "can add ?13 [$36.40] to the fuel bill for an average motorist's annual mileage of 7,400. Similarly, an engine filter choked with dirt can cost another ?6 in the course of a year; defective piston rings - ?5; faulty thermostat-?3; and incorrect ignition setting...