336 Prof. Adeney and Mr. Becker : Determination of Rate of 



w should give a straight line, and when the actual obser- 

 vations are plotted in this way, a straight-line graph results 

 (%• 7). 



Fig. 7. 



60 



\ 1 ! 







\l 







! 













a. 









\ *- 













\ 











\ 





\ 



10 i 



Air-content in ccs. 



2-0 



From the graph of-Hr against iv, we can obtain the initial 



rate o£ solution into air-free water. 



In the diagram (fig. 8) the intercept OA gives the total 

 amount of air absorbed which agrees closely with that 

 calculated from direct observations. 



The intercept OB gives the initial rate of solution at the 

 beginning of the experiment. To obtain the actual rate of 

 solution into air-free water, we must continue the line AB 

 back to meet an ordinate through C, where OC is the quantity 

 of air in solution initially. Then CD represents the initial 

 rate of solution into air-free water. 



