( 188 ) 
u' 
e [> 1 ji : 
ze —1—e '”“. If we draw moreover the curve of the double 
ol th 
dp fey Ses 
points then we have —-—wy,. For the case that u',,=0 we always 
pdy 
find zero as well for the value of ee as for Rae: En 
p dy, p djs pay 
If w,, is positive, the three lines ascend, and they descend if wy, is 
negative. If the value of «,, is very small, there is only a small 
difference in the slope of the three curves. But if wy, has not so 
very small a value, then there is a very great difference in the slope 
of the three curves, and the liquid branch ascends exceedingly fast. 
F dTer , dlog per 
As Eat a T dy, dy, 
ag. 
sae 
we shall have a great value u, if - has a considerable negative 
value, so if the 7%, of the second component is much lower, e.g. if 
we press a permanent gas into a liquid. As in general 7%, does 
: d log per An : 
not depend linearly on 4, and ae has a value differing from 
ay, 
zero, we shall not find the accurate value for w, putting: 
. 
' J ry ryy 
Ba T i( Ter), — (Fer) af 
but only a more or less approximated value. If we choose for the second 
component a substance whose 75, is much lower than fand for the first 
component a substance, whose 7%, is much higher than 7’, we do not take 
an impossible value for w,,, if we give it the value 14 or 15 for 
ordinary temperature. In that case é A may in rough approxima- 
tion be represented by 10°. If we might apply the results we have 
obtained, also in the case of water, though its behaviour is specially 
at low temperatures very abnormal, then we might form an idea of 
the degree of approximation by means of the absorption coefficients 
of gases solved in water. 
According to our results we find for small values of y,, if we 
neglect the vapour pressure of the first component compared with 
the total pressure: 
PE Pa (YI). 
Here p, represents the vapour pressure of the first component. 
Further we have, denoting the absorption coefficient by @, and ‘the 
molecular weight and the density of that component by m, and d,: 
