[ 4 * ] 
With reipedl to the lafl fadts the au¬ 
thor has brought forward, they are con-* 
tradidled by the experiments xx. and xxi. 
in Sedtion I. 
Are mufcular motions all effedted by 
the fame inftrumehtality ? The heart, 
velfels, Aomach, inteflines, in a word, 
all the mufcular parts which are not in 
obedience to the will, adt, I think, by a 
fimple afflux of eledlricity that I fuppofe 
to exift in the nerves in two different hates. 
It is fpecific fimuli which give a deter¬ 
mination to this afflux or difcharge. 
Since there is not any eledtrical fluid 
condenfed in thefe vifcera, one cannot by 
means of a coating and condudtor excite 
fliocks in them as in mufcles, which per¬ 
form voluntary motions. 
In my firft letter on animal eledlricity, 
publiflied at Pavia on the 5th of April, 
1792, I obferved, that the heart of a dog, 
on which I made the experiment, did not 
palpitate at all. Afterwards I had an op¬ 
portunity 
