ft FARADAY 



not this most wonderful and beautiful to see? We still hare 

 the identical chemical force of the particles of zinc acting, 

 and yet, in some strange manner, we have power to make 

 that chemical force, or something it produces, travel from 



FIG. 44 FIG. 45 



one place to another; for we do make the chemical force 

 travel from the zinc to the platinum by this very curious 

 experiment of using the two metals in the same fluid in 

 contact with each other. 



Let us now examine these phenomena a little more closely. 

 Here is a drawing (Fie. 45) in which I have represented a 

 vessel containing the acid liquid and the slips of zinc and 

 platinum or copper, and I have shown them touching each 

 other outside by means of a wire coming from each of 

 them (for it matters not whether they touch in the fluid or 

 outside; by pieces of metal attached, they still, by that 

 communication between them, have this power transferred 

 from one to the other). Now if, instead of only using one 

 vessel, as I have shown there, I take another, and another, 

 and put in zinc and platinum, zinc and platinum, zinc and 

 platinum, and connect the platinum of one vessel with 

 the zinc of another, the platinum of this vessel with the zinc 

 of that, and so on, we should only be using a series of these 

 vessels instead of one. This we have done in that arrange- 

 ment which you see behind me. I am using what we call a 

 Grove's voltaic battery, in which one metal is zinc and the 

 other platinum; and I have as many as forty pairs of these 

 plates all exercising their force at once in sending the whole 

 amount of chemical power there evolved through these wires 

 under the floor and up to these two rods coming through the 



