(453) 
Jn ExtraU 
Of a Letter of M. Denis Trof. of Thilofophy 
and Mathematic^s to M. * * touching 
the Transfurion of Blood ^ 0/ April 2. 
TMs m BngUfh outoftkdth Journal desScavansof 166^; 
Viz, 
Since the Experiments , of which 1 wrote to you the ^^thbf 
March ^ we have cransfufed the blood of thxtt Calves into 
three Bogs ^ to afTure 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 fliall onely inform 
ypii 5 that the Animals , into whom the blood hath beeii tranf- 
mitted , do all of them eat as well as before , and that one of thefe 
three Dbgs , from whom the day before fo- much blood had been 
drawn , that he coiild hardly ftir any more > having been fupplied 
the next morning with the blood of a Galf^ recovered inuantly - 
hisftrengthjand &ewM afurprizing vig^^^^^ 
We have found niew wayes of nlaking this Transfufion with fo 
much facility , that M. Mmmere& undertakes to perform it mth- 
0ut any Ligature ^ onely by pricking 3 like that 5 which is ufed in 
Letting pf bloody 
Oh/ervations 
I - Qncerningtbel^^ of Barks of Trees 
to the Tree u [elf made by Cliriftopher- 
Merret M.T>. andread before the Royal 
$o6&i^fanuar^^^ 1666. 
IH-the m\A9ioiMarch An. i66^, Imadea Sedionof the Rinds 
oi jjh 5 and of the Tree^ falfly called Sycamore. The firft Se- 
&on of each of xh^ Rinds wasfquare, whereof three fides were • 
