EFFECTS OF DEPRIVATION OF OXYGEN 



205 



April 21, 1919. No. 6879, second lieutenant, pilot, twenty-four, single, bac- 

 teriologist. 



Two hundred and fifty hours flying, 100 hours over lines; several combats; 

 24,000 feet for 5 minutes without oxygen, and 20,000 feet for 45 minutes. 



Physical condition good. 



Run was preceded by 5 minutes' rebreathing during which the oxygen was 

 replenished as consumed. 



He attained his maximal performance almost at the start and maintained 

 it up to the 15th minute, when deterioration began and continued up to the end. 

 He was taken off by the psychologist at 25 : 23 as inefficient when he had become 

 very slow and was making numerous errors. 



