1919] 



on Liquid Oxygen in Warfare 



Fig. 8. 



LIQUID OXYGEN RESPIRATOR IN UPPER AIR 



Ascent 



7K.U 



cm'Hq 

 -I-20 



15 Minutes 20 



25 30 



i^ 



Oi' 



ot 



ot> 



(Borometer) 



Fig. 9. 



