128 ON THE CALCULATION OF THE CONDUCTIVITY OF 
POTASSIUM CHLORIDE. 
DILUTION. CONGENTRATION | DILUTION. CON CE 
2 0.3861 0.400 eel 
1 0.7467 | 0.333 2.0328 
0.666 1.0885 0.285 Z.olol | 
0.500 ; 1.4164 } 
SoDIUM CHLORIDE. 
DILUTION. CoNGE A aaa | DILUTION. CONCEN oa 
2.30 0.3257* 0.500 1.1738 
2.00 0.3689 0.400 1.3709 
1.80 0.4036* 0.333 1.5378 
1.64 0.4378* 0.285 1.6776 
1.50 0:4732* 0.250 1.7920 
1.20 0.5752 * 0.222 1.8783 
als 0.6109 0.200 1.9320 
1.00 0.6777 0.182 1.9596 
0.666 0.9456 
oe he oes Prof. MacGregor’s interpolation formula, Trans. N.S. Inst. 
In the case of hydrochloric acid, sufficient data were not 
available. I therefore made a series of measurements of the 
concentrations and conductivities of solutions of this acid, the 
results of which are given in the following table: 
Concentration Molecular Concentration Molecular 
(Gramme-molecules) Conductivity, (Gramme-molecules Conductivity, 
per Litre.) | x 108° per Litre.) x10°- 
| 
1.58 2550 | 2.80 2065 
1.93 2403 2.88 2052 
2.11 | 2347 35 115) 1960 
2.18 2305 3.29 1914 
2.24 | 2290 3.39 1890 
2.46 2245 3.60 1789 
2.51 2192 3.83 1726 
2.56 2164 4.13 1636 
2.66 2141 4.55 1534 
2.78 2090 4.87 1456 
The following table contains values of the dilution and con- 
centration of ions in hydrochloric acid solutions, obtained in 
