100 INJUEY, EECOVEEY, AND DEATH 



tion of NaCl the amount of S changes by means of 

 the reactions 



and that on transferring to sea water S is rapidly con- 

 verted into A. In order to calculate the rate of recovery 

 we find by trial the most satisfactory values of the ve- 

 locity constants. The values thus found are given in 

 Table V. 



TABLE V 



Velocity Constants 



As an example of the method of calculation we may 

 take the case of tissue exposed for 15 minutes to a solu- 

 tion of 0.52 M NaCl at 17 °C. The net resistance in sea 

 water at the start was 960 ohms ; in the course of 15 min- 

 utes in the solution of NaCl it fell to 775 ohms, which is 

 80.69% of the original resistance. The fall of resistance is 

 a little more rapid than in the ' ' standard curve ' ' previous- 

 ly obtained. If we assume that this is due to the difference 

 in temperature (these measurements were made at 17°C. 

 while those on which the standard curve is based were 

 obtained at 15 °C.) we may introduce a correction by mul- 

 tiplying the abscissa by the factor^* 1.06, which makes it 



^' This agrees closely with the temperature coefficient as determined else- 

 where. See page 37. 



