( 1255 ) 
fortiori this will be the case for great vapour volumes; and so we 
can write: 
40985 Ei 
1 Uk ln 1 bg v 
Vk U — al 
or putting in the values vj, and v determined by SypNry Youre: 
Is 6 466,8 1 v 
1,028 1209 | 
3,813 273 r v—by 
Now that we are dealing with such great vorden there is no 
. . . . v . . . . 
objection to putting unity for ae and for ether 7 will not differ 
Li 
ll 
much from oat and so a, be put equal to 0,48. The value of 
the first member is equal to 0,0275, and that of the second member 
to about 0,007. If such calcuiations are made at higher temperatures, 
e.g. for ether at 100°, we find for the value of the first member a 
greater number, viz. 0,172, and also for the second member a greater 
number, viz. 0,107. The difference, however, has become greater. 
Only at a much higher temperature this difference would again 
become smaller — but the ratio would always approach unity. At 
ao 
Ty, the value of the first member is equal to 1— —, and after some 
8 
reduction the second member would also assume this value. And 
what has been said here for ether, holds almost unmodified for all 
substances examined by SypNey Youre, though there is some difference 
in the numerical values, which will be more fully discussed later on. 
If we write the second member in the original form: 
a b 
ven oeh 
the thoeght might occur that by taking for a a function of the 
temperature which increases with decreasing value of 7’, the indicated 
difference might be removed. This, however, is only seeming, and 
Vie fel 1 
this is one of the reasons why I have chosen the form ———— 
(2) S m 
a 
for oat That this only seems to be so, and that we run a risk to 
Vv. 
make the difference still greater by putting such a function of 7’ 
for a, may be demonstrated in the following way. 
? 
ee ek 
7 for a, we have 
If we, namely, substitute aw ( 
