1881.] On the Refraction of Electricity. 441 



These data give the following ratios between the angles of incidence 

 and refraction — 



r 



I. 



II. 



III. 



IV. 



Y. 



2 5 



2 5 



2 5 



3-0 



2 5 



2-7 



3 



2-7 



2-7 



3-0 



3 5 



3 3 



3-0 



3 3 



3 



3 2 



3 2 



3-7 



3 7 



3 4 



and the following ratios between the sines of the angles of incidence 

 and refraction — 



sin^ 

 sinr 



I. 



II. 



III. 



IV. 



V. 



2 5 



2 5 



2 5 



2-9 



2-5 



2 6 



2-8 



2'6 



2-6 



2-8 



3 3 



3 



2-8 



3 



2*8 



2-9 



2-9 



3 4 



3 4 



3 1 



Taking the results as they thus appear, I think they justify the con- 

 clusion that the more probable relation between electrical incidence 

 and refraction is as the sines of their respective angles. And further, 

 as the experimental difficulties are overcome and the inherent sources 

 of error appreciated, this relation may be still more rigidly found to 

 obtain. 



This electro-chemical method being new, it would be well to supple- 

 ment, if possible, the evidence it has furnished of the laws of electric 

 refraction by one based on more familiar principles. I am engaged in 

 .perfecting a method founded on those employed by De la Rive in 

 1825, and by Professor Adams in 1875, for investigating the laws of 

 electric distribution in electrolytes, which I have reason to believe 

 will demonstrate in another way the main facts set forth in this 

 communication . 



Conclusions. 



I. Electricity passes without alteration of direction from one electro- 

 lytic medium to another differing from it in conductivity, when the 

 course is perpendicular to the surfaces of contact. 



II. Electricity, on passing obliquely from one medium to the other^ 



