TRANSACTIONS 



OF THE 



^tivn ffotiau Institute d ^tmu. 



SESSION^ OF 1893-94. 



I. — On the Measurement of the Resistance of Electro- 

 lytes. — By F. J. A. McKittrick, Physical Laboratory, 

 Dalhousie College, Halifax. 



(Read March mh, 1894.) 



During the present session at Dalhousie College, I wished to 

 make a series of experiments, determining the electrical resist- 

 ance of certain electrolytes. Not having the apparatus neces- 

 sary for Kohlrausch's method at my disposal, I employed that 

 used by Ewing and MacGregor (Trans. R. S. Edin., Vol. XXVII 

 (1873) p. 51), which, according to the tests applied to it by Prof. 

 MacGregor (Trans. R. S. Can., Vol. VIII (1890), Sec. Ill, p. 49), 

 seemed capable of giving results sufficiently accurate for my 

 purpose. 



Since this method, for its most successful application, especially 

 if used in the way suggested by Prof. MacGregor in the latter of 

 these two papers, requires some training of the eye in observing 

 the motions of a spot of light, I undertook a series of prelimi- 

 nary experiments. In the course of these experiments, certain 

 improvements suggested themselves to me. These improvements 

 and their effect on the working of the method, this paper attempts 

 to point out. 



As the above method has been fully described by Prof. 



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