612 EFFECTS OF INCREASE OF PRESSURE. [BOOK 11. 



convulsions, exactly in the same way as when oxygen is deficient. 

 Corresponding with this it is found that the production of carbonic 

 :K ill is diminished. That is to say, when the pressure of the 

 oxygen is increased beyond a certain limit, the oxidations of the 

 body are diminished, and with a still further increase of the 

 oxygen are arrested altogether. The oxidation of phosphorus is 

 perhaps analogous ; at a high pressure of oxygen phosphorus will 

 not burn. Not only animals but plants, bacteria, and organised 

 ferments, are similarly killed by a too great pressure of oxygen. 



