576 



Experiments 



Table IX 



Line A of the following graph expresses the results of these 

 last experiments; the oxygen content of the air in which the birds 

 died is marked on the axis of the y's; the manometric pressures are 



Fig. 22 — Confined air which has become lethal under pressures of 20 

 cent, to 24 atmospheres; oxygen content: A, without carbonic 

 acid; B, with carbonic acid. 



