40 RISEN B V PERSE VERANCE. 



first for the balanced matter in the second, of the same for the 

 extra matter in the second, together with the two of the extra 

 electricity in the first for the same two quantities of matter ; 

 and the latter being those of the matter in the first for the 

 balanced matter in the second, of the same for the extra 

 matter in the second, together with those of the electricity 

 in the second both for the balanced and the extra electricity 

 in the first. The two bodies, therefore, ought to meet, as 

 we find they actually do. But no sooner do they meet than 

 the extra electricity of the first, attracted by the matter of 

 the second, flows over partly to it ; and both bodies become 

 positively electrified — that is to say, each contains a quantity 

 of electricity beyond that which its matter is capable of 

 balancing. It will be found, upon examination, that we 

 have now four powers of attraction opposed by five of 

 repulsion — the former being those of the matter in each body 

 for the two electricities in the other ; the latter, those exerted 

 by each of the electricities in the one against both the 

 electricities of the other, together with that of the matter 

 in the one for the matter in the other. The bodies now 

 accordingly should repel each other, just as we find to be 

 the fact. Of course, the same reasoning applies to the case 

 of a neutral body, and any other containing a superabund- 

 ance of electricity, whether it be an electric or no, and in 

 whatever way its electricity may have been communicated 

 to it. We may add, that there is no case of attraction or 

 repulsion between two bodies, in which the results indicated 

 by the theory do not coincide with those of observation as 

 exactly as in this. 



We now come to the phenomena oi the Leyden phial. 

 The two bodies upon which we are here to fix our attention 



