CH71 
Bkns^ then the tumult extends beyond the limits of the hrar^ 
through the whole fyftemeof the Sprits, and whereas in a 
Frenz.]^ Senje^ though miftaken did dired; their paths^ now they 
run qm data fort a ungovern d and impetuous through the Neruts 
and Miifcks cauling the Pi^uolmtary motions and Qonuiilfions of an 
which continue till the Sprits ^ are fpent, the l^kod quiet ^ 
and thehlojd-'vejkls by the %}aj agony enlargd e(jual, to their burden ; and 
indeed in JE/z/ef/^y, diffecitions feldom mifs of a neither 
can we deny this convulfive p^ver of a concretion in the brain ^ linc"e the 
great Ljwtr's experiment tells us that a Dog died in terrible 
Convnljlonihy 'm]t(kQd Milk^coagulatedonly in hts heart i but laftly^ 
if t\iQ Si?:us prove almoft totally obftrucSredj the blood injramlj. 
ore'pws the Jram, and without much previous notice (except 
perhaps of giddmefi^ lojl of fgbt, or the like) an Apoplexy iofues ;- 
which difeafe will alfo more dangeroufly happen, ivhen foms 
■particles of aFolypis in the left 'ventricle .of the. heart broken ofF by the 
violent ftream of i'/W/, fhall beimpaitedunto xk\Q carouA Ar^ 
tiries at their mjertim into tie hram^ whence all interCOUrfe of fpi- 
rits will irrecoverably be ftopt. Now thoin fonie of thefe ca- 
fes a Polyvm does only by fits dif quiet the man it poflelles, yet 
it is in being when it does not produce Juch fenfiyle effeth^ for exercife^ 
paffions^ diet and Other external caufes will fo affedt tlie quantity 
and motion of the i'/^^?^, that the obftrudtion may be moreinfup-- 
portable than when ftream was calm,^ndt\s aseafie toimagine 
thz diforders thus caus d in an animal bodj^ as that a large j'i^ifi 
Rt-ver dam'd up from quietly purfuing its ov/n channel, muft 
needs impetuoajly overflow ail the country about 3 and thuS we have COn- 
GlAqt d thoiQ ^yf^^toms of which a Polypm may rationally be 
thought (at leaft occafionally j the next and immediate caufe. 
As for others before niention'd, namely, t^e Plague^ ^ener-efd 
Difeafcs^ Ungring F elvers , and the Me, they are not the effects of a 
but caufes that dilpofe the__^/^^^^ of fome Perfons to 
i\lCX\.titmtousC}ncretions. 
. But to difcover their caufe more nicely we may obferve 
with /"f that perfons thus afflicted are never well, breath 
hardly^ h.ave f eqmnt- p.alpttamns -of the hearty unequal itdfesy are dull to 
all at'tion^ 'fiupd^ luxurm-is and' (Icithful ^ of a livid leaden or fizllovj Com-* 
p^exion or a jatm\ned red tn hands and face, btcd^^je there ps cither "very little 
blood ui the Capillaries of thesr fkin^ or at beft a fi^iv clrculatton their 
blood has ujudly a thickntf and fecuUar lentor rn if. or abundance of ferum^ 
■the later for -want of 'volatile fait to' digifl the chyle into a lai-^dable red^ and 
the former 'Happi-is'^ either becaufethe'heart, •deftitnte of fpi- 
rits for its.polfe, cannot: duly agitate the mafs, or (as expe- 
riments on blood emitted feem to prove) by reafou of the mix--' 
ture oi a preternatural Jctdy whence may infer this coitfimil 
