EFFECTS OF DEPRIVATION OF OXYGEN 



199 



e of **** Rbrathin 



29 . ,~. 43 



id;"hod ymuton " of imnandlng faint 



Observers- Lt . laaacg PK.-. Cqpt.. Apijle- pii> nr . PannhRl p., . QJ^, 



On m-h.PTt. L(UrW- . Ploted by-Btt. f.gw^ O. * .tart 1_ finUN'jJL 



TIKE nutanma 



June 2, 1919. No. 6892, second lieutenant, observer, age unknown, single, 

 ranchman. 



Forty hours flying. 



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

 replenished as consumed. 



A distinct recovery from initial impairment followed by a steady decrease in 

 performance, coincident with a diastolic drop. Removed for inefficiency after 

 failure to find the next letter in several attempts. Muscular incoordination 

 with marked tremor during 27th minute. 



