and on the Construction of Voltaic Batteries. 83 



It will be observed here that in the 4th and 5th instances, 

 in which there was a great disparity between the sizes of the 

 two arrangements, the results of their combined action were 

 not divided equally between the two, but appeared greater 

 in that vessel in which the greater zinc plate was acting. But 

 when we come to those experiments in which the arrange- 

 ments are fitted to copper plates in the relative proportion of 

 16 to 1 of zinc, it will be seen that the results are different; 

 that then in every instance the action is equally distributed 

 through any combined series. 



I now tried a combination of three arrangements, in which 



Table No. 11. 

 When separate. When joined. 



A gave hyd. ... 2* cubic inches. 



B gave hyd. ... 9* 



C gave hyd. ... 18* 



Total 29- 



A gave hyd. ... 3*4 cubic inches. 



B gave hyd. ... 3 4 



C gave hyd. ... 3*4 



Total 10-2 



These experiments appear to be interesting in other respects 

 than as they bear upon the object for which they were ex- 

 pressly made. But confining myself to the immediate purpose 

 I proceed to show : 



C. The mutual influence of arrangements when they were 

 equal in size compared with one another, but in which the 

 elementary zinc and copper plates are in the proportion of 

 1 to 16. 



Three arrangements were prepared exactly alike. 



Table No. 12. 



When separate. When joined. 



No. 1, lost zinc ... 19-9 grains. 



No. 2, lost zinc ... 25*0 grains. 



No. 3, lost zinc ... 237 grains. 



Total 68-6 



No. 1, lost ... 28-8 grains. 



No. 2, lost ... 29 3 grains. 



No. 3, lost ... 28*5grain§. 



Total 866 



Showing by the results in A that when similar arrange- 

 ments were connected with copper plates of the same size as 

 the zinc, their combined action was remarkably reduced; but 

 when the copper piates were in the proportion of the last 

 experiment in C, then, instead of a great reduction in the 

 amount of their action when combined, compared with 

 what it was when they were separate, we find that their action 

 is as remarkably increased: for by Table, No. 9, (in which 

 the copper and zinc plates are equal) we find a reduction of 

 about one third to take place on combination, and in this last 

 investigation, C, we find as remarkable an increase. 



D. To determine the influence exercised in those cases in 



M2 



