[ 263 J 
changes into angine in the unfettled rheu- 
matifm, and particularly in the fpurious 
or nervous, in which the difeafe changes 
every day or every hour, fometimes even 
quicker than light, and palTes from one 
limb to another. In the blood all the fluids 
are confounded, united, and agitated by 
a quick uninterrupted motion, and after*' 
wards are equally diftributed by innumer¬ 
able veflels to every part of the machine, 
fo that it is not poffibie for any morbific 
matter to be feparated from it, with fo 
much rapidity, and be afterwards deter- 
mined to fome particular part. This, 
however, does not prevent the fpirits when 
affedted by the difeafe being carried with 
a certain impetus, firll to one part and 
then to another alternately, and to difiend, 
vellicate, throw thefe parts into fpafmo- 
dic contractions, and produce in them a 
tranfient difeafed affedtion. 
And moreover thefe fpirits determinate 
S 4 the 
