312 



Mr. A. Tribe on Electrolysis. 



[Feb. 17, 



No. of Strip from 

 + pole. 



Cub. centim. 



of K Cy used. 



No. 1. 



No. 2. 



1. 



6-5 



5-8 



2. 



3-5 



2-8 



3. 



2-6 



2-0 



4. 



1-8 



1-7 



5. 



2-0 



1-7 



6. 



2-1 



2-0 



7. 



2-0 



1-9 



8. 



2-3 



1-9 



9. 



2-4 



1-6 



10 



2-3 



2-0 



11. 



3-3 



2-8 



12. 



3-7 



3-1 



which, graphically represented, give curves as in this diagram. 



These quantitative experiments also accord with the view of Grotthus. 



Nos. 3 and 4 would show that the whole of the molecules of the elec- 

 trolyte were equipolarized, which follows from the fact that in any given 

 section of the liquid there must have been the same number of polarized 

 particles as in that in immediate contact with the electrodes ; whereas 

 in Experiments V. and VI. it would appear that the number of polarized 

 particles increases as the section is removed from the electrodes, and the 

 intensity of the action in any definite space is accordingly diminished. 

 Grotthus's view, however, as it appears to me, does not account for the 

 difference of polarization of the molecules in the vicinity of the two 

 electrodes, as exhibited in Experiments V. and VI. 



The principal source of error in the foregoing experiments is the 

 difficulty of placing the strips in a straight line and perfectly parallel in 

 direction ; for if not parallel to the line joining the electrodes, the 



