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),
Fig. 25.
and if I place this in connection 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 collect 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 apparatus, the wires are a good way apart from each other, and it now seems that each of them is capable 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
