[ 29 ® I 
I have here given only a very imperfcd 
account of difeafcs, but the obfervations 
and fads contained in it are more than fuf- 
ficient to demonflrate that miafmata only 
ad upon the nerves, and that the feat of 
all acute difeafes is in this fyfletn. 
Of the Secretions. 
The power, by means of which the 
different organs of the animal body fepa- 
rate different fubflances from the mafs of 
fliuds, is a my fiery in phyfiology. 
This power, whatever it may be, is 
regulated and governed by the nerves. 
Every nerve pofTeffing a fpecific fenfibility 
of its own, is only excited by the contad 
of fubflances which are in relation to it. 
, At this excitement they impel into adion 
the machine upon which they are ex¬ 
pended, and which they govern. 
Is a portion of the nervous eledricity at 
this moment poured into the fecretory 
veil'ds ? Can 
