C497> 
Tcry frequently gckbs divert a greater malady 5 fince if thofe 
impurities which caufe the famej iffued not out at the furf ace 
of the bodya they would remain mixt with the fubftance of the 
blood, and falling upon fome noble Part, produce verydan^ 
gerous effe<£l:s therein. 2. Suppofing the blood of the Man* 
gie Dog wholly corrupted in his Veins^ is it neceflary it ftiould 
produce the Mange in him that receives it f Is it not poffible 
that vitious blood may be purified when it becomes mixt with 
better, and that the great heat which caufed the extravafation 
in the one in order to produiftion of the Mange, may be allay- 
ed by the coolnefs of the other wherewith it is mixt , and con- 
fequently not produce the fame cffefts. Laftly, Is there any 
affurance that the Mangy Dogs blood hath not produc'd fome 
evil ejffedis in the body of him who received it } He ihould 
have been open'd fome days after,and perhaps the corruption 
which render'd not it felf apparent outwards,mighc have been 
^ifible within. 
Hitherto therefore I find not cither Reafons or Expend 
ments fufficientfrom the opinion J have conceived ofthe be- 
nefit of Tf^wz/f^/o^j* and in the Difcord lobferve ofPhyfiti- 
ansj whereof fome approve the Invention, and maintain that 
it may with pradence be preferib'd for the care of divers Di- 
feafes, others refped it as a very iifelefs Novel ty^ andLaftly, 
others keep themfelves undetermined ^ expe(3:ing what fuc- 
ceffe the Experiment will produce 5 I willingly joya with the 
firft, and refign my felf to the enfuing reafonsj until fome bo- 
dy (hall produce others to the contrary of greater weight.^ 
The Tramfujten of the blood of one Animal into another 
is fujfficiently taught us by "Nature it felf, and it muft be grant- 
ed that if we ever pradife the fame, we Ihall do no more but: 
imitate her 5 fince whirft fhe cannot yet adminifter nourifti- 
taent to the Fsetus by the mouth, and his ftomack is not fit for 
d!geftion,flie makes a continual Transfufion of the Maternal 
blood into the Umbilical Vein of the Infant, therewith to 
nourilh, vivifie and encreafe all the parts of the fame. Nor is 
it to be anfwered here, that the Mother and Child are in this 
ftate tobecosfider'd, but as one and the fame BodyandSub- 
ftance. For it happens frequently enough, that the Paternal 
D d d Seed 
