470 Mr. R. Hosking on the Electrical 
at, needed further investigation, and with that object mainly 
in view the experiments described in the present paper were 
undertaken. — | 
As solutions with high concentrations would be necessary 
to test one of these points, lithium chloride was chosen as 
the salt to be used. 
The method of experimenting was practically unaltered. 
but there were slight variations which will be briefly indicated, 
The dilatometer described in the joint paper was again used 
for measuring the specific gravity of my solutions at all the 
temperatures. 
Viscosity. 
The glischrometer was changed back to the original form 
described in an earlier paper (Phil. Mag. Mareh 1900, 
p. 274), which was more likely to give accurate values for 
viscosity ; and the viscosity of my solutions was found in 
the way there described. 
In this new glischrometer the following constants were 
determined, correct at 0° C. 
Corrected length of capillary tube = 5°4391 cms. 
Mean radius of the capillary tube = 0°011592 ems, 
Working volume of each limb = 3°8441 c.cms. 
and in the formula 
eax pei eee 
T 
the values for log a and log @ came out as 77521643 and 
244902. 
(1+ 2yt) 
Resistance. 
The cell in which the electrical resistances were measured. 
was similar to that described in the joint paper, and its 
capacity was determined by measuring in it the resistance of 
a standard solution of sulphuric acid (20 per cent. by weight). 
The value obtained for the capacity was 136°43 em.—! at 
18° C. 
The modified arrangement of Kohlrausch’s method *, by 
which a double commutator and a moving coil galvanometer 
are used instead of the coil and telephone, was employed to 
determine the resistances. Our previous arrangement was very 
similar, the magneto-alternator being used instead of the 
dry cells and one set of sectors on the commutator. 
The commutator was driven by a water-motor, and could 
* Phil. Trans. A. exciv. p. 380 (1900). 
