very frequently Scabs divert a greater malady 5 fince if thofe 
impurities which caufe the fame, iffued not out at the furface 
of the body, they would remain mixt with the fubftance of the 
blood, and falling upon fome noble Part, produce very dan* 
gerous effects therein. 2. Suppofing the blood of the Man- 
gie Dog wholly corrupted in his Veins, is it neceffary it Ihould 
produce the Mange in him that receives it f Is it not poflible 
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 production of the Mange, may be allay- 
ed by the cooinefs of the other wherewith it is mixt , and con- 
fequently not produce the lame effeCta. LaftJy, Is there any 
affurance that the Mangy Dogs blood hath' not produc’d fome 
evil effects in the body of him who receiv'd it ? He Ihould 
have been open'd fome days after,and perhaps the corruption 
which render'd not it felf apparent outwards, might have been 
vifible within. 
Hitherto therefore I find not either Reafons or Experi- 
ments lufficient from the opinion I have conceived of the be- 
nefit of Transfufion $ and in the Difcord Iobferve of Phyiiti- 
ans, whereof fome approve the Invention, and maintain that 
it may with prudence be preferib’d for the care of divers Di- 
feafes , others refpeCt it as a very ufelefs Novelty; and Laftly, 
others keep themfelves undetermin’d , expecting what fuc- 
ceffe the Experiment will produce $ I willingly joyn with the 
firft, and refign my felf to the enfuing reafons, until fome bo- 
dy lhall produce others to the contrary of greater weight. 
1. The Transfufion of the blood of one Animal into another 
is fufficiently taught us by Nature it felf, and it muff be grant- 
ed that if we ever praCtife the fame, we {hall do no more but 
imitate her s> fince whifft Ihe cannot yet adminifter nourifb- 
ment to the Fcetm by the mouth, and his ftomack is not fit for 
d geftion, (he makes a continual Transfufion of the Maternal 
blood into the Umbilical Vein of the Infant, therewith to 
nourifh, vivifie and encreafe all the parts of the fame. Nor is 
it to be anfwered here, that the Mother and Child are in this 
Hate robe coefider'd, but as one and the fame Body and Sub- 
ftaoce. For it happens frequently enough, that the Paternal 
D d d Seed 
