222 INJURY, RECOVEBY, AND DEATH 



amount of decrease corresponds to the amount of a hypo- 

 thetical salt compound (Na 4 XCa). This is also true in 

 the case of protoplasmic resistance, as shown in Fig. 95. 36 

 It would therefore appear that we arrive at the same 

 conclusions whether we study net resistance or protoplas- 

 mic resistance. When the solution is changed the con- 



02 



* = Increase in K A + K M 

 a = i. " K AP 



.01 



12.50 20 33.33 63.73 84.34 94.22 100 



Ca C1 2 in surface 



FIG. 94. Ordinates represent the increase in value of K A -f- K^and K^p -=- K MP . In each 



case the value given represents the increase over the corresponding value in the solution con- 

 taining 1.41% CaCh (the per cent, in the surface being 12.5). Abscissae represent per cent. 

 of CaCh in the surface. In order to facilitate comparison the values of K AP -r- K^ !P have 



been divided by 1.685. 



stants change in a corresponding manner in both cases, 

 the only difference being in their absolute values, but it 

 is evident that in this case differences in absolute values 

 are of no importance. 



It should be emphasized that this general conclusion 

 would remain valid in case it should be found that the 

 values given here for Cp and Cw are incorrect. There 

 seems to be no doubt that the value of Cw is constant 

 under the conditions of these experiments and as long as 



38 



A rough calculation shows that this is also true of 

 (corresponding to the K N and K O mentioned on page 98)- 



