148 THE FITNESS OF THE ENVIRONMENT 



tion of 1 kilogram of carbon dioxide in 100 

 liters of water, to which sodium hydrate is 

 being added. At the beginning of the experi- 

 ment the hydrogen ion concentration will be 

 approximately 0.0001 N, almost exactly one 

 thousand times that at neutrality, and the 

 hydroxyl ion concentration 0.0000000001 N, 

 one one-thousandth that at neutrality. If, now, 

 the sodium hydrate be added to the solution 

 in successive portions, the change of reaction 

 will be as indicated in the following table: — 



