DECOMPOSITION OF WATER. 



77 



they are like, and how many of them there are ; 

 and for this purpose I have here some more 

 water in a slightly different apparatus to the 

 former one (fig. 25), and if I place this in con- 



nection with the wires of the battery (at A B) I 

 shall get a similar decomposition of the water 

 at the two platinum plates. Now I will put 

 this little tube (o) over there, and that will col- 

 lect the gas together that comes from this side 

 (A), and this tube (H) will collect the gas that 

 comes from the other side (B), and I think we 

 shall soon be able to see a difference. In this ap- 

 paratus, the wires are a good way apart from each 

 other, and it now seems that each of them is capa- 

 ble of drawing off particles from the water and 

 sending them off, and you see that one set of 

 particles (H) is coming off twice as fast as those 



