By a new ruling of the Federation Internationale Aeronautique (TiME, Nov. 12), an aviator must rise—in order to beat Sadi Lecointe's 36,745 ft. world's altitude record—400 metres (or nearly 1,300 feet) higher than the present mark.

Last week, Lieutenant John A. Macready tried for a second time to beat Lecointe. He failed—reaching the modest elevation of 34,983 feet. His altimeter recorded 41,000 feet but the altimeter is not an absolute instrument to show height. It measures how much lighter the air is at heights than it is at ground level. On a cold...

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