EFFECTS OF DEPRIVATION OF OXYGEN 



225 



TIME IX MINUTES 



June 4, 1919. No. 6888, second lieutenant, observer, twenty-five, married, 

 structural engineer. 



Two hundred and fifty hours flying with very little over lines. 



Physical condition: Just out of hospital following general nervous breakdown, 

 but was feeling fit at time of examination. Run was preceded by 13 minutes' 

 rebreathing during which the oxygen was replenished as consumed. 



The compensation in this case was through increased effort, following the 

 appearance of an initial impairment in the eighteenth minute. Under further 

 diminution of oxygen he greatly increased his performance, but it declined 

 steadily after the 27th minute. He was taken off by the psychologist at the 

 moment of a psychological break. 



