ANTAGONISM 



149 



Proceeding in the same manner with, the other mix- 

 tures, we get the values given in Table XI. Starting with 



A Decrease in Km 

 □ .. » Kn 



X <• >• Ko 



V " " Ks 



0000500- 



% Ca CLj in soluBm. 



Fig. 64. — Shows the increase of a hypothetical salt compound NaiXCa (see Table XI) and the 

 correspondingdecreaseof the velocity constants iC^,.^(^, iJT^ and iiT^ (these constants are 



given in Table X) . The figures on the abscissss give the molecular per cent, of CaCla in the 

 mixture. The mixture containing 62.0% CaCl2 is.taJcen as the standard of comparison: 

 proceeding from this to the mixtures containing less CaCla we find that Na4XCa increases 

 and the velocity constants decrease as shown by the ordinates. In order to facilitate com- 

 parison the valuesof X^ have been multiplied by 0.989; of Xq by 0.991; of X^by 0.383; and 



of Kjifhy 0.251. 



the lowest value (that in 62:0% CaClg) we observe that 

 there is an increase as the per cent, of CaClg decreases 

 until 2.44% is reached (the amount of this increase is 



