38 



STUDIES ON RESPIRATION. XII 



for the alkali curve a proportional part of the ordinate of the neutral 

 curve obtained by the use of the apparatus. Thus if by the direct 

 method the rate of production of CO2 in the alkaline solution was 

 two-thirds as great as in the neutral solution it was assumed that 

 this would also be the case if the experiment could be performed in 



Rate of CO^ production 



4,0007. 



3min 



Fig. 2. Curves showing the rate of production of CO2 by a solution of 

 dextrose and hydrogen peroxide as related to the acidity of the solution. 



the apparatus and accordingly the ordinate of the alkali curve in 

 Fig. 1 was made equal to two-thirds the ordinate of the neutral curve. 

 From these experiments it was found that the production of CO2 

 in the alkaline solution was at first below that at neutrality, but the 

 fall in production was less rapid, and as will be seen from Figs. 1 and 



