152 Mr Kleeman, On the Properties of a liqud : 
The different values of each of these corresponding quantities — 
for a number of liquids will probably not differ much from one 
another for a constant temperature, if it is low, ¢.e. that of the 
room, since the differences between the values of a corresponding 
quantity for a constant temperature decrease with decrease of 
temperature. 
A case of special interest is the following. From one of the 
foregoing equations by differentiation and elimination we obtain 
dr 
ne Dd; > , where JD, is a corresponding quantity. This equation 
ae D,ra, by means of the equation giving the 
coefficient of expansion, where D, is a corresponding quantity. 
Now the surface tension is approximately a linear function of the 
temperature, and is therefore approximately given by an equation 
of the form >) = d,(1 46,7), where 6, is approximately a constant. 
The former of the last two equations may therefore be written 
may be written 
where g, is a corresponding quantity. Since 6, is approximately 
a constant and a does not vary rapidly with the temperature, g; 1s 
approximately constant over a considerable range of temperatures. 
This is the empirical relation connecting 6, and a proposed by 
Cantor*, who showed that g,=2°3 approximately. Table I 
TABLE II. 
Name of substance r 6, a In 
VAT COM ayree mceas eae DET 0-013 0-00491 2-6 
Carbon monoxide...) 13:5 | 0-013 0.00454 2-9 
Caclnnumageere ee errr 830 | 0:00042 | 0-000170 2-5 
ARs celta CRA 610 | 0:00027 | 0:000114 2-4 
IGEN ion dence aecare nie 510 / 0:00029 | 0-000129 2:2 
IBemZene ss 1h a tee 29:4 | 0-0035 0:00139 2°D 
Hthyl alcohol ...... 34:3° | 0:0027 0:00124. 2:2 
IP nemOls pia ewe ees 40:6 | 0:0029 0:00089 3°3 
PNrn Wind Oa 88.2 oases 45-0 0:0025 0.00092 27 
Nitro benzene ...... | 48:2 00028 0:00089 3°1 
Carbon disulphide 546° 0°0029 | 0-00121 2-0 | 
contains the values of g, for a number of substances selected from 
a table given by Freundlich in his book on Kapillarchemue. 
* Zeitschr. f. phys. Chemie, xxx1x. 129 (1902). 
