102 
IOWA ACADEMY OF SCIENCES. 
SO obtained for was 4.79, from which the corresponding 
values for k were calculated as recorded in the table. They 
show a fair constancy, in spite of the rather questionable calcu- 
lation of the maximum conductivity, for all solutions more 
dilute than Above this point they increase rapidly, reach- 
ing a maximum at whence they fall off again very fast for 
the most concentrated solutions. 
For the more dilute solutions the mean value of k is about 
. 001 . 
The peculiar behavior of k suggests the, a priori very proba- 
ble, supposition that in the more concentrated solutions an asso- 
ciation of molecules takes place, resulting in the formation of 
Lig Clg or higher aggregates. In order to get more light upon 
this, a series of molecular weight determinations by the boiling 
point method were undertaken, Beckman’s apparatus being used. 
The thermometer (by “ Geissler’s Nachfolger”) was divided into 
55 of a degree C, and 505 could be estimated with more or less 
certainty. The elevation constant for amyl alcohol was ascer- 
tained by a series of observations with solutions of salicylic 
acid. {Confer. Schlamp, Zeit. ph. Chem. 14, p. 278.) 
TABLE II. 
MOL. B. PT. ELEVATION OF SALICYLIC ACID IN AMYL ALCOHOL. 
GRAMS PER 100 OF SOLVENT- g 
RISE OF B. PT — D 
MOLECULAR RISE— S. 
0.6504 
0 130 
25 4 
1 3296 
0.260 
26.9 
3.0248 
0 400 
37.1 
2.7760 
0 535 
36 5 
3.4736 
0.670 
36 7 
26.5 mean. 
MOL. B. PT. ELEVATION OF LITHIUM CHLORIDE IN AMYL ALCOHOL 
LITRES PER G. MOL. OF 
SOLVENT. 
GRAMS PER 100 OF SOLVENT 
RISE OF B. PT.-D 
M= S-L 
A 
.88 
6.060 
3.398 
715 
100 
5 333 
2. 060 
69 3 
1.50 
3.536 
1 873 
50. 
2.00 
2.650 
1.330 
57. 
4 00 
1.318 
.871 
40. 
8 00 
0.653 
.438 
40. 
These results clearly show that association occurs in the 
more concentrated solutions. 
It is intended to extend the examination, as soon as circum- 
stances permit, to the more dilute solutions in order to secure 
