That if ’tis a rare chance to find its blood in the Veins of 
Beafts ; ’tis almoft impoffible not to find fame corruption in 
that of Men, how healthful foeverth y feem to be. Yea, e- 
ven in Children yet fucking, it is not wholly unblamable- 
becaufe, having been nourifht with the blood and milk of 
their Mothers, they have fuckt corruption together with their 
nourifhmenr. 
2. If Phyficians fo fuccefsfully employ the milk of certain 
Animals, to which they oblige certain Patients for fome whole 
years together : If we are very well nourilht with theflefhof 
fome, during all our lives, and if their ju’ces be fo advana- 
geous to us for repairing our natural ftrength i Why may we 
not hope greater advantages from the mixture of their blood 
with ours. 
3. The Operation may be made more boldly, and with 
greater fuccefs by employing Brutes. Eor, being we defign 
to take the beft blood that is to be had, and leaft fubjeft to co- 
agulation, ’tis certain that the Arterial blood upon acount of 
its heat and tenuity, poflefTeth both thofe qualities in much 
more perfection than the Venal. And the dangers and in- 
conveniencies which would occur in opening the Arteries 
of: a man are not confiderable, when tis a beaft on whom the 
Operation is made. 
4. Beafts may be better fitted and prepar’d for this ufe than 
men.For I fhould advife thofe, that would employ this Experi- 
ment to the beft ad vantage, to feed their Beafts for fome daies 
before-hand with more care and exquifitenefs than ordinary : 
fihee, if by the tafte we can difeern the flefh of Calves fed for 
fome time, with Milk, and Yolks of Eggs to be much more 
pleafant than that of others i reafon ought to perfwade us that 
their blood is alfo meliorated according to their feeding. 
All thefeReafonsjoynd to the Experiments we have made, 
could not but induce us to give affurance to the publick ofrhe 
little danger to be fear’d, and the confiderable effedbjto be ex- 
pend from this Operation. Yea, we imagin’d ’twere no rafli- 
nefs to make tryal of it upon men, and indeed divers perfons 
®f much gravity and prudence follicited us to beg fome con- 
demned Criminal^ on whom to make the firft Efiay. But ha« 
ving • 
