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Pressure readings from all types of gages were now 

 compiled, and elaborate graphs prepared. To the grati- 

 fication of the experts, the graphs jibed closely with ex- 

 pectations. Both the height and shape of the plotted 

 curves agreed well with predictions made months be- 

 fore by scientists from the Los Alamos Laboratory and 

 from the Navy's Bureau of Ordnance. The accuracy, 

 too, was satisfying. Although individual values often 

 appeared out of line by 20 or 40 percent, when the read- 

 ings of all gages at a given range had been averaged, a 

 composite value of high accuracy resulted. 



Many pressure values considerably greater than 

 100 pounds per square inch were successfully recorded. 

 They were obtained by gages located at or just above 

 the surface of the water some distance from the pro- 

 jected Zeropoint. Unfortunately, there was no gage 

 located exactly at the projected Zeropoint; but esti- 

 mates indicate that the pressure there was extremely 

 great — expressible in hundreds or thousands of pounds 

 per square inch. At greater distances, pressure values 

 were, of course, smaller; at ranges of 2000 to 3000 

 yards, for example, the pressure was well below ten 

 pounds per square inch. The radiosonde-type pressure 

 gages parachuted from planes at ranges of six or eight 

 miles performed well. Their radioed messages were re- 

 ceived, recorded, and analyzed. Their pressure values, 

 amounting to only a small fraction of a pound per 

 square inch, were in excellent agreement with one 

 another. 



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