\ * 
(453) 
An ExtraB 
Of a Letter of M. Denis Trof. of ‘Pbilofopby 
and Adatbematicfy to M. * * * touching 
the Transfufion of Blood, of April 2. 
1 66y. 
This we Engtilb out of the 8th Journal desScmns of 1667. 
Vise. 
.. • ‘ , . .... . 
S ince the Experiments , of which I wrote to you the $?th of 
March e we have transfufed the blood of three Calves into; 
, , - 
three Bogs , to affure our felves , what the mixture of two fuch 
differing forts of blood might produce. I fhall hereafter acquaint 
you at large with the particulars 5 at prefent I fhall onely inform 
you a that the Animals , into whom the blood hath been tranf- 
mitted , do all of them eat as well as before , and that one of thefe 
three Dogs , from whomtheday before fo much blood had been 
drawn 5 that he could hardly ffir any more , having been fupplied 
the next morning with the blood of a Calf , recover’d inftantly 
his ftrength, and flaew’d afurprizing vigor. 
We have found new wayes of making this Transfufion with fo 
much facility V that M . Mmmrez undertakes to perform it with 
out any Ligature 0 onely by pricking 0 like that , which is ufed in 
Letting of blood, 
Obfervations 
Concerning the Uniting of BarJ<s of Trees cut, 
to the Tree it felf • made by Chriftopher 
Merret Ad. L. and read before the Royal 
Society fanuary $>. 1 666, 
I H the mid ft of March An, 1 66 4. I made a Sedion of the Kinds 
of Jjh 5 and of the Tree, falfty called Sycamore, The firft Se- 
ction of eachof the Rinds was fquare, whereof three fides were 
