Pre ANSACMIONS 
OF THE 
Nova Scotian Institute of Science. 
SESSION OF 1899-1900. 
I—On THE RELATION OF THE VISCOSITY OF MIXTURES OF 
SOLUTIONS OF CERTAIN SALTS TO THEIR STATE OF 
IonizaTIon. — By James Barnes, B. A., Dalhousie 
College, Halifax, N. S. 
(Communicated by Prof. J. G. MacGregor on December 15th, 1899.) 
The present paper is the result of a piece of work undertaken 
at the suggestion of Prof. MacGregor, for the summer vacation 
of 1899, the object being to find out in the case of mixtures of 
aqueous solutions of certain electrolytes with a common: ion, 
whether or not it is possible, by the aid of the dissociation con- 
ception, to predict the viscosities of the mixtures, when sufficient 
-data as to the viscosities and conductivities of the constituent 
solutions are available. 
The salts selected were sodium chloride, potassium chloride, 
barium chloride, sodium sulphate, potassium sulphate, and 
copper sulphate, the viscosities of simple solutions of these salts 
having been determined by 1 Reyher and ? Wagner, and that of 
mixtures of them by * Kanitz, and extensive series of observa- 
tions on the conductivity by Kohlrausch and by former students 
of Dalhousie College, being available. As will be seen below I 
found 4 Kohlrausch’s values of the conductivity sufficient for my 
purpose. 
1Ztschr. f. phys. Chemie, 2, 744, 1888. 
2 Tbid., 5, 31, 1890. 
3Tbid., 22, 336, 1897. 
* Kohlrausch u. Holborn: Leitvermégen der Elektrolyte, 1898, pp. 159, 160, tab. 2. 
Proc. & TRANS. N. S. INs?. Scr., VoL. X. TRANS.—H. 
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