( 873) 
Ie An Bes BV: 
Cyclohexane J- aniline. 
Temperature of the critical end-point 319.0. 
Concentration 
| weight of | Boiling- | g7 | dT 
‘ss the aniline | — per %/5 | 
to100parts, point de ax 
| of mixture | | | 
| 
(4) 0 80.75 | 
0.243 26.95 
0.0167 | 1.85 81.20 | 
| 0.26 | 22.67 
0.0586 | 6.45 | 82.15 | 
| | 0.185 2012 
0.41083 44 285 Seen 
0.127 | 43.53 
0.28 | 22.92 84.55 | | 
| |; 0.090 9.51 
0.2749 2055 SOD 
| (On KOT OE Ae EO 
073919: Vr SDB 86.00 
0.116 11.84 
0.4237 | 44.86 86.85 
| OEAAD. we |: AM OS 
0.4988 52.41 87.75 | 
0.145 14.45 
0.5576 BO 88.60 
| 0.204 - | 20.08 
0.6074 63.43 89.60 | 
| 0.70 | 67.24 
().6892 71.05 dat) | 
3.8 soy is 
ie 100 184.40 
of the most volatile component is according to Youre. But a more 
accurate investigation shows that this difference falls entirely within 
the limit of errors of the measurements. For first of all the 
differences between the values given by Youre and those given here 
are always very small (2 a 3 mm.), and they can be caused by 
traces of dissolved air, which, as is known, is exceedingly difficult 
to remove '). Then the hexane we used, was slightly less pure than 
that of Youre (too great density viz. 0.67713 instead of 0.67693 0°/4°), 
whereas on the other hand our cyclohexane was purer than that of 
Youre (higher melting-point 6°.50 instead of 4°.7), and these impurities 
are sufficient to explain the deviations. 
For a further confirmation we have investigated the boiling-point 
line of these systems’). The experiments were made with BeckMANN’s 
apparatus and with a thermometer of Baupin, graduated in fifths of 
degrees, and provided with a correction table; all the results have 
been reduced to the normal pressure of 760 mm. For both mixtures 
1) Cf. Pu. Konnsramm Dissertation p. 179. 
*) Boiling point line of isopentane + nitrobenzene see Addendum p. 957. 
57” 
