J813 



siüiiallv il (letinite value tü 3, tbr instance 18. Bj then cuiubiniiijj; the 

 equations, say for />//=r7.52 and for ƒ>//=: 7, a was eliminated 

 directly. The same process, applied to the inpiations for />/y=6.40 

 and for i)jj=H.03, atforded a second equation, in which only k„ 

 and k/, were unknown. Fioin these two equations k„ and kf, were 

 calculated. 



In table 13 are summarised the values found for />// and pan, 

 the concentration of the //-ions and (>//-ions (multiplied by 10**) 

 determined and those calculated on the basis of three different 

 values of ,1 



TABLE 13. 



Ph 



5.84 



6.13 



6.40 



6.67 



7.0 



7.21 



7.52 



7.64 



7.80 



8.03 



8.13 



8.65 



Po 



•/ƒ 



188 (0/y) 



105 m 



determi- 

 ned 



7.94 

 7.65 

 7.38 

 7.11 

 6.78 

 6.57 

 6.26 

 6.14 

 5.98 

 5.75 

 5.65 

 5.13 



144.5 



74.13 



39.81 



21.38 



10. - 



6.17 



3.02 



2.29 



1.59 



0.93 



0.74 



0.22 



1.15 

 2.24 

 4.17 

 7.76 

 16.6 

 26.92 

 54.95 

 72.44 

 104.7 

 177.8 

 223.9 

 724.4 



20.5 



22.1 



26.7 



35.4 



51.3 



67.- 



75.2 



70.3 



62.3 



47.3 



41.7 



24.4 • 



105m calculated for: 

 9 = 18 3= 17.9 : ;?= 19 



20.6 



23.— 



27.2 



35.— 



51.3 



64.8 



75.2 



72.4 



64.- 



49.— 



43.4 



26.— 



20.5 

 22.9 

 27.1 

 34.7 

 51.3 

 64.9 

 75.2 

 72.2 

 63.6 

 48.7 

 43.1 

 25.9 



21.6 



24.- 



28.2 



35.7 



51.3 



64.— 



75.2 



73.7 



66.9 



53.- 



47.3 



28.- 



Taking li to be 18 or 17.9, the ditïerences of m determined and 

 ill, calculated are not larger than, according to table 12, the ditïerent 

 values of iii at the same pn determined on different days: hence 

 not larger than the uncertainty, left in their experimental estimation. 



For /?=:19 the deviations are distinctly larger. 



For (S^ll.S the calculation from the above four values of in 

 produced a negative kn- Hence the minimum value of ii would be 

 about 17.9. 



The results of these calculations, as regards k„. kf, and (( are 

 summarised as follows: 



