152 INJUKY, RECOVERY, AND DEATH 



we replace the tissue in sea water the reactions > 

 8 >A >M >B proceed at the rates which are nor- 

 mal for sea water. The manner in which the rate of 

 recovery is calculated has already been explained in 

 detail. It is assumed that during the exposure 

 to any of the mixtures the following reactions occur: (1) 

 N >0 ^P;(2)# >S >T ; (3)A+M-+B. By 

 assuming values of the velocity constants of these 

 reactions we can approximate the observed results. The 

 velocity constants thus found are given in Table X. An 

 inspection of the table shows that all these velocity 

 constants behave like K A #nd K M in that as the per cent, 

 of CaCl 2 in the mixture increases (beginning with 1.41% 

 CaCl 2 ) the value of the velocity constant first falls and 

 then rises, and that this value in every case reaches its 

 minumum in the mixture containing 97.56 NaCl + 2.44 

 CaClo. It would therefore appear that the reactions 

 N * * P and R *> 8 *- T are inhibited by Na 4 XCa 

 in the same manner as the reactions A > M > B. This 

 is borne out by an inspection of Fig. 64, in which the 

 decrease 14 of the velocity constants is plotted, together 

 with the increase of Na 4 XCa. 



14 By the decrease in the velocity constant is meant the decrease which 

 we observe as we pass from the solution containing the highest per cent, 

 of calcium (38.0% NaCl + 62.0% CaCl 2 ) to mixtures containing smaller 



per cents of calcium. Thus the decrease of # 3f = 0.009 ^ M the decrease 

 of K N = 0.00134 - - E N ; the decrease of K Q = 0.0013266 K Q ; and the 

 decrease of K = 0.00319 K Q . In the same manner we find that the 

 increase in the amount of Na 4 XCar= amount of Na 4 XCa 0.000047. 



The decrease of the amount of K A and K R is not shown in the 

 figure because it depends not only on Na^XCa, but also on the per cent, 

 of CaCl 2 . 



The fact that even in the presence of the maximum amount of Na 4 XCa 

 these velocity constants are greater than in sea water is of course to 

 be attributed to the other substances present in sea water. 



