G't'8) 
der the life of it Cafe and beneficial. Of the number of thefe 
feems to be that French Virtuofo , Gaffer de Gur ye de Montpolj ■ 
who in a late Letter of his to Monfieur Bourdelot, declares to the 
World, that this is a very Ingenious Invention, and fuch an one, as 
may prove very ufeful *, but withall , that, in his opinion, it is to 
be ufed with much caution, as not being like to be pra&ifed 
innoxioufly, if imprudent men do mannage it , and the con- 
courfe of two differing forts of Blood requiring many tryals, and 
a careful obfervation of many circumffances, to give affurance. 
He fuppofes , that the Blood of every Animal is endowed with 
its peculiar Temper, and contains in the Aggregate of its parts, 
different natures, principles, figures, and even a different Centre.- 
Whence he concludes, that two Subftances thus differing, and 
containing plenty of Spirits 3 are not reducible to one and the 
fame Centre, nor to one and the fame Body without Fermenta- 
tion •, and that this Operation may prove of danger to him, that 
{hall haye admitted into his Veins a flrange Blood ( wont to 
be free in its native veffels ) without pafling through thofe 
degrees, that muft give it Impreffions futable to the temper 
and Funftions of the Vitals of the Recipient. And taking 
for granted , that no confiderat man will hazard a Total Trans- 
fufion, he acknowledges that a Partial one may beinfome ca- 
fes and fickneffes very ufeful , provided, it be practifed circum- 
fpedfly , upon a Body yet fhong enough , and in a moderate 
quantity D fo as the Spirits and Blood of the Recipient may be 
able to diffolve and matter the transfufed ttrange Blood , and 
convert the fame into its own nature by a gentle Ebullition $ to 
obtain by fuch a commixture a principle of motion, that may 
caufe a better habit of Body.- And he believes, that this E- 
bullition muff alwayes happen in Bloods of differing parts and 
qualities •, and that very hardly two. Animals, of differing fpe- 
des’s, ages and tempers, will be met with, that have Blood fo 
like one another, as not to need Fermentation, to make , a requi- 
fit mixture. He doubts not, that if a fubttance could be found 
fo refembling that of our Spirits r as that it would immediate- 
ly unite, it felf with them , not needing any alteration, the 
Transfufion of fuch a Subftance would be capable to produce 
effeds little lefs than miraculous , by relieving the proff rated 
r ' ^ forces 
