402 
Lincoln—Electrical Conductivity. 
no deflection of the galvanometer needle was observed, the fact is 
indicated by the minus sign (—). The plus sign ( + ) indicates 
that the solution did conduct. The addition of the interrogative 
sign to the plus sign (-f- ? ) indicates that a very slight movement 
of the needle was detected; and when the plus sign is followed 
by the exclamation mark (+ !), this indicates that the solution 
conducts sufficiently well to make a quantitative determination 
desirable. The magnitude of the conductivity can be learned 
from the quantitative results given subsequently. Blank spaces 
indicate that determinations were not made, and the letter i 
indicates that the salt was insoluble in the solvent or very 
difficultly soluble. In the last two columns respectively, are 
given the dielectric constants and the coefficients of association 
of the solvents. The data in these two columns are as complete 
as could be obtained from the literature. 1 
The letters R & S refer to the article by Ramsay and Shields 
as authority; 2 R & A to the work of Ramsay and Aston; 3 and 
D & F to that of Dutoit and Friderich. 4 The letter Y desig¬ 
nates determinations by Vollmer, C by Carrara, D & A by 
Dutoit and Aston, and S by Schlamp. 
From Table I it will be observed that ferric chloride dis¬ 
solves in the hydrocarbons and their halogen substitution 
products, but the resulting solutions do not conduct. This is 
in harmony with what other investigators 5 have found concern¬ 
ing solutions of other salts in these solvents. It will be noted 
that both the dielectric constants and the coefficients of asso¬ 
ciation (as far as they were available) are very low. The acid 
chlorides, acetyl and benzoyl chlorides, yield solutions of ferric 
chloride and antimony trichloride that do conduct. The co¬ 
efficient of association in the case of acetyl chloride is about 
unity, thus showing no polymerization and the dielectric con¬ 
stant (the results of Drude and Thwing differ greatly) is much 
*(1) Thwing, Zeit. phys. Chem. 14, 286; 1894. 
(2) Drude, Zeit. phys. Chem. 28, 308; 1897. 
2 Ramsay and Shields, Jour. Chem. Soc. 83, 1089; 1893. 
3 Ramsay and Aston, Jour. Chem. Soc. 65, 168; 1894. 
4 Dutoit and Friderich, Bull. Chim. Soc. Paris (3) 19,321; 1898. 
6 Kablukoff, Jour. Russ. Chem. Soc. 23, 391; 1893. (Ref.) Jour . 
Chem. Soc. 64, ii. 151; 1893. 
