Science: High Stream

Six miles up, where the air is thin and cold, a fearful wind zigzags round the earth at 200 m.p.h. Meteorologists call it the "jet stream." Last week, at Asbury Park, N.J., a convention of the International Air Transport Association considered the jet stream and the effect it will have on the operation of the high-flying airliners of the future.

Meteorologists have known about the jet stream for a long time. Sometimes their sounding balloons get into it and are quickly whisked out of the range of their instruments. Apparently it is caused by an encounter between two air masses of different...

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