Word: vaporous
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Dates: during 1950-1959
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...electron microscope is man's sharpest artificial eye, but it can examine only dead, dry objects. The electron stream that it uses instead of light requires a high vacuum, so no water or water vapor can remain in the instrument. The usual method of preparing microorganisms or viruses for electron microscopy is to dry them at ordinary temperatures before putting them in the instrument...
...puts a film of collodion on a copper disk cooled with liquid air (temp. ~377-6° F.). Then he sprays his microorganisms on the cold film. They freeze solid in a flash. When he pumps the air from around them, their moisture passes directly from ice to vapor, leaving their empty husks in the exact shapes they had at the instant they were frozen...
Tubing comes next, Glass tubing is preferable, although an all-rubber construction is possible. One point of clarification. The small bottle will serve as the cooling jacket for the condensed vapor emitting from the larger box to the left of the diagram on the right. If you don't understand this technicality, do not worry. Just follow the directions...
...vapor-trailed sky over Schweinfurt and Bremen and other German targets eight years ago, U.S. airmen learned-the hard way-an inescapable fact about daylight bombardments. Unless designed to outfly their opposition, bombers must be escorted to & from distant targets by long-range fighters, fast enough and numerous enough to stand off enemy interceptors. The alternative: prohibitive losses. Last week over North Korea, where U.S. pilots are still flying World War II 6-29 Superforts that lesson was underscored again...
...left. Bridgeman was on his own. With bare hands (no gloves for this critical job), he flicked four switches in quick sequence. Each switch fired a rocket chamber. They made a curious sound-a "bloof" and a "schplunk," as Bridgeman describes it. A trail of dense white vapor streamed out from the tail. Ten seconds after the drop, Bridgeman was speeding faster than sound. He did not even feel this "passing through the fence...