[ 47 ] 
are fo many anomalies as to render it im~ 
poffible to eftabliffi a fcale of their affi¬ 
nities. In general, it appears, that lead 
makes the bell coating, and filver the bell 
conductor. It fhews, likewife, that the 
order of fucceffion of the other metals, is 
in a certain degree proportioned to their 
analogy with the two firft. 
Metals when covered entirely with feal- 
ing-wax, are not good conductors when 
the animal begins to be weak. 
I have obtained only fome occafiona! 
feeble fhocks with them, whilft with 
another conductor of the fame metal, 
diameter and length, I have had frequent 
and very obvious ones. 
In proportion as the principle of life 
difappears, they become Hill vvorfe con¬ 
ductors, and are incapable of being fo at 
all before it is entirely extinCt. The other 
conductor ferved me as a criterion and 
meafure, and, in faCt, fo did thefe when 
deprived of their non-conduCting covering. 
Water 
