HCl C, Hs Mixture I. #= 0,1388 
t Pa t Pa t Pa Pb 
14,55 38,03 13,2 32,21 13,7 40,42 42,33 
21,3 44,25 21,3 38,75 21,3 48,11 49,97 
30,23 53,82 25,4 42,19 25,4 52,74 54,48 
41,45 68,47 | 30,23 46,92 | 30,23 58,36 59,93 
51,3 84,13 | 31,88 48,04 | 4145 7437 75,26 
43,1 daal 
Mixture II. #=0,4035 | Mixture III. z==0,6167 | Mixture IV. #=0,7141 
t Pa Pb t Pa Pb t Pa Pb 
14,1 - 45;72 46,94 | 14 43,96 45,83 14,5 42,18 44,60 
21,2 53,36 54,25 | 21,3 51,64 53,18 21,3 . 49,08 51,10 
25,4 58,42 59,19 | 25,4 56,55 57,57 | 25,4 53,87 55,25 
30,23 64,80 65,11 | 27,25 59,15 27,33 56,49 56,92 
30,43 65,30 | 27,25 59,30 27,37 56,84 
30,53 65,42 | 
The results of the determinations of the isothermals are repre- 
sented in the tables from A to F. The following remarks may be added : 
The values represent the observations, so that the corrections, 
which might be drawn from the graphical representation, have not 
been applied. 
The isothermal of 25°,4 for HCl and that of 52°,5 for mixtures II are 
not given, as the former was most likely not reliable, and as the 
latter could not be determined, because the CArLLETET-tube was broken. 
When the substance was divided into heterogeneous phases, the 
vapour-volumes then present were also repeatedly measured ; they 
are, however, less accurate than the total volumes on account of the 
uncertainty of the correction, which is to be made for the meniscus. 
All volumes are expressed in the theoretical normal volume (i. e. the 
volume at 0° and 1 atm. multiplied with (1+ a) (1—d)) as unity; 
moreover the volumes, at which for the first time liquid is to be 
observed, are underlined, and those at which the vapour phasis dis- 
appears, are doubly underlined. 
The pressures are expressed in atmospheres, the error will seldom 
exceed 1/1990, at least for the lower pressures. 
