Quantitative Determinations. 
419 , 
The following cryoscopic results will be of interest in connec¬ 
tion with the conductivity measurements. The molecular weight 
determinations were made with a Bechmann’s apparatus, and all 
of the usual precautions necessary to insure accurate results were 
observed. The solvent was the same as that employed in the con¬ 
ductivity measurements, but it was further purified by being re¬ 
crystallized several times. The molecular lowering of the freezing 
point used in these calculations was 70.70 (see Ostwald’s Grun- 
driss der allgemeinen Chemie). The constant for nitrobenzene 
has been lately redetermined by Ampola and Carl inf anti 1 who 
give 69 as the new value, while from their calculation accord¬ 
ing to van’t Hoffs formula they found it to be 68.6. The fol¬ 
lowing results were not recalculated; for while the correction 
throughout would be the same and rather small, the relative 
values would remain practically the same. 
Table XXI. 
Solvent: nitrobenzene. 
Ferric chloride, Fe Cl 3 , 
Mol. Wt. = 161.14. 
Substance in 100 g solvent. Lowering. 
Mol. wt. 
1.4792 
0.330° 
316.9 
1.6510 
0.433 
269.6 
1.9661 
0.575 
241.7 
2.3582 
0.728 
229.2 
3.0566 
1.065 
203.0 
3.4823 
1.255 
196.2 
4.0097 
1.501 
188.9 
4.7389 
1.756 
190.8 
Antimony Trichloride, Sb Cl 8 , 
Mol. Wt. =225.06. 
2.5811 
0.714° 
255.6 
3.1528 
0.910 
245.5 
5.2983 
1.585 
236.3 
6.3113 
1.928 
231.4 
7.2706 
2.248 
228.7 
8.3095 
2.655 
223.3 
10.6533 
3.555 
211.9 
1 Gazz, Chem. Ital ., 
26, II, 76; 1896. (Ref.) Jour. 
Chem. , 
12; 1897. 
