y6 Conductivity of Aqueous Solutions. Part IV. 



The results were as follows : 



It will be seen that the difference in conductance is insignificant at both 

 temperatures, although in one experiment the bomb was less than half 

 full of liquid. A computation shows in fact that the volatilization of sol- 

 vent at 100 would be such as to account almost exactly for even the slight 

 difference of conductance observed at that temperature. Therefore, no 

 correction for change in conductance-capacity from variation in the quan- 

 tity of liquid was required in any of the measurements made in this inves- 

 tigation. 



35. THE CONDUCTANCE-CAPACITY AND THE WATER CORRECTION. 



The conductance-capacity of the cells was computed from conductivity 

 measurements made at 18 with various solutions of potassium and sodium 

 chlorides, using for the equivalent conductances of the solutions the values 

 of Kohlrausch and Maltby.* The data are given in table 13. 



The final values of the conductance-capacity were used in calculating the 

 equivalent conductance in all experiments made on or between the dates 

 on which the corresponding separate values were determined. Between 

 the last date of one set and the first date of a following one, intermediate 

 values of the conductance-capacity were used, the value being varied 

 in accordance with the probable changes caused by the successive runs. 

 The value at 18 actually used in each experiment will be given in connec- 

 tion with the conductivity data for that experiment (section 39). In the 

 experiments which were carried to 281 and 306, the conductance-capacity 

 at 18 after heating was often appreciably different from that at the begin- 

 ning; and in such cases the values used at 281 and 30G were based upon 

 the final conductance-capacity at 18. In presenting the data of these 

 experiments the separate values of the conductance-capacity at each tem- 

 perature will be given in the tables. 



*Wissensch. Abhandl. phys.-techn. Reichsanstalt, 3, 210. 

 stein-Meyerhoffer, Tabellen, p. 744. 



See also Landolt-Born- 



