Word: barographs
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...Louis in flight. In Washington, the Smithsonian Institution's National Air and Space Museum, where the plane is on permanent display, has assembled a collection of Lindbergh memorabilia - including his flying outfit, a $25,000 check he won as a prize for the flight, and his barograph, which recorded altitude changes and proved that he made no landings between New York and Paris...
...bomb exploded at 8:33 a.m. British time. By 11:44 a.m., the first air wave reached England, having taken 3 hr. 11 min. to travel from Novaya Zemlya at the speed of sound-about 700 m.p.h. At 4:40 p.m. on the next day, the barograph pen jiggled again, recording the air waves that had taken the long path and circled the earth in the opposite direction and approached England from the southwest. At ten minutes past midnight on Nov. 1, the first wave swept over England again, making almost as strong a record as on its first trip...
...explosion of the Indonesian volcano Krakatoa sent out air waves that registered easily on the crude barographs of the period. Big as the Soviet bomb was, its waves were far weaker than the volcano's, but the time they took to circle the earth was almost exactly the same: 36 hr. 27 min. Small variations in their speed were due to varying winds and temperatures. Carpenter is now putting the Soviet bomb test to unexpected and peaceful use: he is asking the world's scientists to send him copies of their barograph records so that he can study...
...once the wave gets going, its front gets steeper and steeper and the air in the wave may rise more than a mile in a few minutes. This causes a sudden rise of barometric pressure that shows as a sharp jog on the chart of a specially sensitive barograph...
Because he is a Swiss citizen, Comte may not claim the South African gliding altitude record, which now stands at 21,000 ft. He will have to send the record from his sealed barograph home to Switzerland for any official recognition. In Johannesburg, however, South Africa's Champion Harry Lasch shook his head in amazement at Comte's flight. Official or not, "it was magnificent, and is going to be very hard to beat...