AQUEOUS SOLUTIONS.—MCKAY., 333 
Concentration. Dilution in Mixture. Conductivity. 
Concen- 
tration of 
ions in the) Calcu- | Differ- 
NaCl. | } BaClg. | Mixture.| Nac. } BaClg. | lated. | Measured. ence 
per cent. 
3.012 2.029 1.282 .4439 .0200 11373 1880 —.5 
2.007 2.7715 1.195 .4886 .3072 |13804 1310 —.5 
2.007 2.029 1.079 .5580 .4322 |1167 1171 —.4 
.9986 3044 .4501 1.601 1.315 | 474.8 473 +.4 
. 7964 3044 .38D0 | 1.903 1.586 | 407.8 407.6 +.1 
.5979 .6404 4084 1.658 1.574 | 445.2 444.9 +.1 
4994 .4048 23128) Zou 2.009 | 337.7 339.8 —.6 
4994. 3044 .2852 | 2.641 2.289 | 307.9 307.4 +.2 
.4013 4048 .2803 | 2.688 2.275 | 304.0 304.9 —.3 
4013 .8044 2457 | 3.098 | 2.685 270.6 270.8 —.l 
.00602 .01113 .00757 123.9 ‘6.8 8.577 8.56 +.2 | 
.01002 .00667 .00756 116.9 124.0 8.166) 8. = +.1 
.01002 .011138 .00961! 96.54 90.85 10.38 10.36 +.2 
.00602 | .00667 .00582 162.9 153.3 6.36 6.322) +.6 
In the case of solutions of from 0.3 to 0.5 gramme-equivalent 
per litre, which can be measured in the first cell, under the most 
favorable circumstances, the combined error of conductivity and 
analysis may amount to about 0.3 per cent. In the case of 
normal solutions it may reach 0.6 per cent, and in the case of very 
dilute solutions 0.6 per cent also. Hence, except in the case of 
the first solution of the above table and one other, the differ- 
ences of the last column are all within the limits of experi- 
mental error. Also, the number of positive differences is about 
the same as the number of negative, and except that in the 
three strongest solutions they are all negative, and in the 
