General Discussion of Results. 
441 
normal, while the average of two series shows normal values for 
HgCl 2 . The qualitative results given above show that solutions 
of HgCl 2 conduct electricity. 
The coefficients of association of the nitriles show that their 
molecules are polymerized, with the exception of benzonitrile. 
This solvent shows a high value for its dielectric constant; but 
no values for the other nitriles could be found in the literature. 
ORGANIC BASES. 
Of the organic bases investigated, pyridine and quinoline 
were found to yield solutions that conduct electricity much 
better than piperidine. Laszczynski and Gorski 1 have determined 
the conductivity of a number of salts in pyridine, and their re¬ 
sults are platted on Plate VII. 
Lithium chloride, it will be noticed, yields solutions that con¬ 
duct very poorly; and the authors attribute this fact, as Carrara 
did in the case of this salt in acetone, to the combination of 
the solvent with the dissolved substance forming LiCl + 
2 C 5 H 5 N. They assign limiting values to fx in the case of 
NH 4 .CNS, XH 4 I, KI and Nal. From Plate VII it appears that 
the curves representing the conductivity would become asymp¬ 
totic. The values for AgN0 3 are my own determinations, and 
these do not appear to approximate a limiting value for ^ at least 
in the dilutions at which the measurements were made. A glance 
at Table XXV will show that the silver salts give larger values 
for [x than even the salts of the alkalies, according to Laszczyn¬ 
ski and Gorski. 
Werner’s 2 boiling point determinations show about normal 
molecular weights for the salts of the heavy metals in pyridine. 
The average of his determinations for AgN0 3 is 165.4, —theory 
169.55; for Hg(CN) 2 , 216.68,—theory 251.76; for Hgl 2 , 
308.0,—theory 452.88; and for Pb(N0 3 ) 2 , 352.07,—theory 
requires 330.35. In most cases he obtained values a little 
under the theoretical. The greatest discrepancy occurs in the 
case of Hgl 2 , and it will be observed that the solution of this 
salt yields small values for /x . 
1 Zeit , Electrochemie , 4 , 290 ; 1897 . 
2 Loc. cit. 
