436 
Lincoln—Electrical Conductivity. 
THE ALDEHYDES. 
From the quantitative measurements of the electrical conduc¬ 
tivity of solutions in aldehydes, the results of which are given 
in Tables VI, VII, VIII and IX, it will be observed that 
furfuro^ yields the largest values of fx for solutions of ferric 
chloride. The dielectric constant of this solvent is larger than 
that of any of the other aldehydes. Owing to the great vola¬ 
tility of acetic aldehyde, satisfactory quantitative measurements 
at 18° C. were not made; but from the qualitative results it 
will be seen that this solvent yields solutions that conduct 
fairly well. 
The magnitude of the molecular conductivity can be readily 
seen from the results. The value of fx increases with the dilu¬ 
tion in all cases except for the solution of ferric chloride in 
benzaldehyde. The conductivity increases with the tempera¬ 
ture, except in the case of the solution of the trichloride of 
antimony in paraldehyde, in which instance the conductivity 
appears to remain virtually constant. In the solution of ferric 
chloride in salicylic aldehyde the conductivity becomes prac¬ 
tically constant at about 45° C. 
The coefficents of association of the aldehydes, as far as these 
could be found in the literature of the subject, indicate that 
their molecules are not polymerized. 
THE KETONES. 
The ketones were found to yield solutions that conduct elec¬ 
tricity fairly well. Considerable work has been done with 
these solvents. The conductivity of the solutions of a number 
of salts, both organic and inorganic, has been measured by 
Laszczynski, 1 Carrara, 2 Dutoit and Aston 3 and some boiling 
point determinations in acetone have been made by Dutoit and 
Friderich. 4 
Acetone yields solutions the conductivity of which is in gen- 
1 Zeit, Electrochemie, 2» 55; 1895. 
1 Gazz, Chem. Ital., 27, I, 207; (Ref.) Jahr. der Electrochemie^ 4, 
48; 1897. 
3 Comptes rendus, 125, 240; 1897. 
4 Bull. Soc. Chim. Paris (3) 19, 321; 1893. 
