SCO 



TENTH ANNUAL EI POST OF 



stance^ 24 elements can "be arranged in S diifereiit ways, as renderetl 

 apparent in Fig. 14. 



Fiff. 14. 



1. 



9 



i>. 



4. 

 5. 

 8. 



As a battery of 24 single elenaents. 



do 12 double elements. 



do . 8 treble elements. 



..do... 

 ..do... 

 ..do... 



6 four-fold elements. 

 4 .six-fold elements 

 3 ci<j:]it-fold elements. 



1. do 2 tv/-eiTe-fold elements. 



8 do 1 tweaty-four-fold elements. 



Which one of these combinations should be selected in a given case, 

 depends vipon the resistance to condnetion of the circuit. That com- 

 bination mnst be taken the resistance of which is nearest to that of 

 the given circuit. Denoting by 1 the resistance cf an element, the 

 resistance of the — 



Ist combination is 24. 



2d do........ G. 



3d do 2.666 



4th do. 1.5 



