OSTERHOUT— DYNAMICAL THEORY OF ANTAGONISM. 551 



It might be assumed that no salt compound is formed but that 

 A'l is increased by CaCL and that the effect is at a minimum at 

 NaCl 95.24 + CaCL 4.76. In this case /v^ would be very large in 

 pure NaCl, very small in NaCl 95.24 + CaCL 4.76 (or thereabouts) 

 and would steadily increase as the proportion of Ca increased. 

 If /v'2 is increased by NaCl, with a minimum at NaCl 95.24 -f 



23 50 75 HOURS 



Fig. II. Curve of electrical resistance of Latninaria in CaCU ( ), 



the trial curve ( ) calculated from the velocity constants 



i^i = .0018 and iv. = .0295, and the theoretical curve ( ) calculated 



from the velocity constants i^i= .0017827 and /v. = .0295. 



CaCL 4.76, /vo would be large in pure NaCl, would diminish as 



CaCL was added until it reached a minimum at NaCl 95.24 -|- CaCL 



4.76 and would then rise steadily as more CaCL was added. ^* 



In this case it makes little difference whether the value of the 



!■* It might also be assumed that both A'l and K-i are increased by CaCl^ 

 (or both by NaCl) with a minimum effect at NaCl 95.24 + CaCU 476 

 But if only one salt controlled both A', and A', it would make little difference 

 what the other salt was and this does not fit the facts. 



PROC. AMER. PHIL. SOC, VOL. LV, II, AUG. 22, I916. 



