EFFECTS OF DEPRIVATION OF OXYGEN 



223 



June 3. 1919 2 : 40_PJI.__ 



_.Dur.tic ""'".7' 1 " 



lt-.Vy VYt:t 1 PJ g 1 ^ t nn Account of 'failure 



June 3, 1919. No. 6893, second lieutenant, pilot, twenty-seven, single, mechan- 

 ical engineer. 



One hundred hours' flying. None over lines. 



Physical condition good, but had lost sleep the night before examination. 



Run was preceded by 13 minutes' rebreathing during which the oxygen was 

 replenished as consumed. 



A moderately fast and accurate performance up to the last series, when he 

 became inefficient at the time of a break in systolic and diastolic blood pressure 

 and pulse rate. He had been holding to his performance level by increased 

 effort under low oxygen. 



