[ 4 1 3 
on that account it is, that the effeCts are 
more apparent. 
The difcharg es excited by thefe two 
means boon ceafe, and then the coating 
becomes neceffary. 
It conftantly happens in this new' cir- 
cumftance, when the coating is of the 
fame fort of metal with the conductor, that 
the.electricity of the animal does not make 
its appearance. 
Profeffor Galvani afferts, that he has 
fometimes obtained fome very weak marks 
of it, although the plate which the coat¬ 
ing touched, the coating itfelf, and the 
conductor were all of iron. There is, 
however, reafon to believe, that all the 
iron was not of the fame quality, or that 
, 
this circumftance happened at the very be¬ 
ginning of the experiment. My attempts 
have been made not only with iron, but 
with other metals, as copper, lead, tin, 
gold, and zinc. To excite the move¬ 
ments. 
