1507 
2.0 
1.5 
1.0 
0.5 
gest 
401 
® 2.166 21 2.0 1.9 1.8 17 1.6 
Fig. 5. 
It appears that through the points found thus a straight line can be 
drawn of the equation : 
l Ten tes 
Kote hyo ee =a „Udo. 
d P FE at 2) 
If this line is extrapolated to the transition point (f= 184.5 ; 
103 7—! = 2.186) we find log p= — 0.371. This value is also given 
in fig. 5. If the explanation given is correct, this point must be the 
point of intersection of the lines O’ 4’ and O’D’ fig. 3. Hence in 
fig. 5 the line O/D’ must therefore be drawn through this latter 
point, aud the points which are found for evaporating dry ammonium 
chloride, and which are again indicated by squares in fig. 5. It 
appears from fig. 5 that this is impossible. If we draw straight lines 
through the point of transition and the three observations, the devia- 
tions of the two other observations become very large, as appears 
37 
Proceedings Royal Acad. Amsterdam. Vol. XVIII. 
