Word: perring
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Dates: during 1960-1969
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Unlike a pure-oxygen system, which requires a cabin pressure of only 5 lbs. per sq. in., a two-gas system would have to approximate the sea-level pressure on earth-14.7 lbs. per sq. in.-to ensure that enough oxygen reached the astronauts' lungs. If a small meteorite should puncture the skin of a ship containing a nitrogen and oxygen atmosphere and cause rapid decompression, the astronauts on board would develop a painful and perhaps fatal attack of the "bends"; nitrogen dissolved in their bodies would come out of solution, forming gas bubbles in tissues...
...missions. Before Cosmonaut Aleksei Leonov could leave Voskhod II for his space walk, he had to breathe pure oxygen (to rid his body of dissolved nitrogen and avoid the possibility of bends). He then entered an air lock, sealed his suit, gradually lowered its pressure to about 3 lbs. per sq. in. (so that it would be less inflated and more flexible) and only then was able to open the outer hatch and step into space, still breathing pure oxygen. By contrast, U.S. astronauts, always breathing oxygen at reduced pressures, can step directly out of their cabin into space...
...Roger Chaffee first shouted a warning about the fire, that there were faint signs of movement, and that at 6:31:09 Ed White, too, reported the cockpit blaze. Other NASA control center instruments recorded the fact that the cabin pressure (held at a level of 16 lbs. per sq. in.) began to increase, and that three seconds after White's warning, Chaffee cried out again about the fire and there was more evidence of the men's moving about...
...just the price of milk that bothers Hoffman. He believes that in general, groceries run about 25 per cent too high...
Last year, 71 per cent of the class of 1966 pledged a total of $6,901. The Fund received $2,627,801 from 20,000 alumni...