( 107 ) 
__3d Some observations made at + 15° make it very probable, that 
the p=f(ea) curve will show a point of inflection also at that 
temperature, and even at about the same vq as that at 0°. 
If it was not our intention to make the existence of a point of 
inflection probable, it would be better for testing the results at the 
theory, to use instead of the former formula, the formula 
s | 
= 
a 
& 
a: 
Ek 
_ 
& 
& 
as this formula may be expected to hold good with much greater 
approximation, also for the values of zg which are not near Oor 1. 
It appears, however, from Table IV and the points (x) of fig. 4 
which are derived from it, that the agreement is not much closer 
Dee = Bre Tas Ee EM. 
2 Ld—Lv Zo 
dg P dea calc. observed. calc. observed. 
0.1 76 73 | 0.086 0.082 0.014 0.018 
OP 9 84 84 0.160 0.155 0.040 0.045 
0.3 93.5 102.5 0.230 0.224 0 070 0.076 
0.4 105 128.5 0.294 0.273 0.106 0.127 
0.5 199.5 168.5 0.325 0.295 0.175 0.205 
0.6 139 204 0.352 0.270 0.248 0.330 
0.7 163 171 0.220 0.155 0.480 | 0.545 
0.8 | 176 | 103 0.094 | 0.075 | 0.706 | 0.725 
0.9 183 50.5 0.025 0.020 0.875 0.880 
This is the first time that the formula, derived from the theory 
of the mixtures, has been used for the attempt of deducing one of 
the two curves p==/f (av) and p=/(a) from the other, when both 
have been determined experimentally. Only when rz and 1—« are 
small, the result is satisfactory. Further investigation will have to 
prove, whether the great differences for z near '/g are to be attri- 
buted to the observations or to the formula. 
