of blond Being weaker, it will be apt' to congeal the (boner, 
fo that at the latter end of the work you mult draw out the 
Qul.ll ofter, and clear thepaflage, if the Dog be flint- heart- 
ed, as many are, though fome flout fierce Dogs will bleed 
fryely and uninterruptedly , till they are convuls'd and dye. 
But to prevent this trouble, and make the experiment certain, 
you* mu ft bleed a great Dog into a little one, or a Majiive in- 
to a Curr , as I once try’d, and the little Dad bled out at lead 
double the, quantity of his own bloud, and left th q Majiive 
dead upon the Table, and after he was untyed, he ran away: 
and (bak’d himfelf, as if he had been only thrown into water. 
Or elfe you may get three or four feveral Dogs prepared in 
the fame manner , and when one begins to fail and leave off 
bleeding, adminifter another, and I am confident one Dog 
will receive all their bloud, (and perhaps more) as long as. 
it runs freely, till they are left almoft dead by turns : provided 
tlrat you let out the bloud proportionably, as you let it goe 
into the Dog, that is to five. 
Third ft, I fiippofe the Dog that is to bleed out into difhea 
will endui eit the better, if the Dogs that are to be admini- 
ftred to fupply his blond, be of neer an equal age, and fed 
alike the day before, that both their blonds may be of a neer 
ftrength and temper. 
There are many things I haveobferved upon bleeding Dogs 
to death, which I have feeniince your departure from Oxford^. 
whereof I ftiall give you a relation, hereafter 5 in the mean, 
time fince you were pleafed to mention it fo the Royal Society^ 
with a promife to give them an account of this experiment, 
I.could not but take the fir ft opportunity to clear you, from 
that obligationj&c. 
So far this Letter : the preferiptions whereof having been 
carefully obferv'd by thofe who were imployed to make the 
Experiment, have hitherto been attended with good fuccefs y, 
and that not only upon Animals of the fame Species fas two 
Dogs .■ .fir ft, and then two Sheep) butalfb upon home of very., 
differing species fas a Sheep and a Dog 5 the former Emitting 
the: other. 'Receiving.') 
Note only , that in (lead of a Quill ) a finall. crooked thin . 
Pipe 
