thofe of the Blood. On the eontrary,as ’tis certain that cooling 
Meats or Medicaments ferve to temper the heat of the Blood 
when itboilesin the Veines, and hot food or Phyfick excite 
new vigour in fuch blood, as old age or a Difeafe hath ren- 
der’d torpid and coagulated in the Veflels;fo ’tis as reafonable 
to infer, that great advantages will follow upon the mixture of 
different bloods, provided the fame be directed and manag’d 
by the ordinary prudence of able Phyfitians ; and that if a hot 
Blood can reinfufe new ffrength into that which languifheth 
with coldnefs , fuch blood as hath colder qualities, may alfo 
check the Ebullitions and Tumults of that which is overmuch 
chafed. 
As for the authority of Hippocrates^ who faith that extrava- 
fated blood corrupted^ It is no wife repugnant to our preten- 
$ons. For to falve the honor of that great Perfon, his mean- 
ing muft be rightly expounded 3 which is no more but this ; 
that the Blood neceffarily corrupteth when it is out of the Vef- 
fels, which prefer ve its heat, and which permit it a natural mo- 
tion and free circulation, whereby it purifieth it felf continual- 
ly. For example, being extracted into adifli, wherein all its 
parts are ffopt and coagulated , it muff in a little time alter 
its conftitution, as experience witnefFethv Nor doth this 
hinder but that it is alfo corrupted fometimes in its own place, 
contrary to that Aphorifme, Quicquid corrumpitm , inloco aliem 
Gwrnmpitur : For if its motion be interrupted in the Veines ei- 
ther by fome obft rudtion form’d therei®, or fome divifion oc- 
cafion’dby a Wound or Contufion, itcortupteth in a fhort 
fpace and degenerateth into purulent matter. But in this Ex- 
periment of Transfufion, the Blood -is communicated in fuch 
manner , and pafTeth out of one animal into another , that ’tis 
iixipoffible its natural motion fhould be interrupted. ’Tis true 
it paffeth through unnatural Conduits* but thefe being once 
warmed and admitting no air into their cavities, they caufe no 
more alteration in the Blood than the Arteries and Veines 
shemfelves do, 
Moreover , fuch as conceive that the blood Transfufed 
muft 
