' * ' y - < «J> • 
mid Circulation of the Blood. 12 $ 
A. A. reprefen ts two .Arteries* one of 
which runs ori each Side of a minute GriiHe* 
B. B. their open Communication with 
two Veinsj C C. 
As this whole Fifh Was hot half an Inch 
in Length> how fmall rauft the Tail thereof 
be, in which* hotwithftanding* the Circu¬ 
lation of the Blood was vifible in thirty-four 
Places, and the Current of it in fixty-eight 
Veffels! and yet thefe Veffels w r ere very far 
From being the moil minute of all. How 
inconceivable then mult be the Number of 
its Circulations in an human Body I Nor 
heed we wonder to behold it Bluing forth 
at every Prick of a Pin or Needle. Upon 
confidering this, Mr. Leeuwenhoek: adds, 
that he is fully perfuaded* a thoufand differ- 
ent Circulations of the Blood are continual¬ 
ly carried round in every Part of a Man’s 
Body that is not larger than the Breadth of 
his Fore-finger Nail 
V J. f f • i * V* 
The i ail of a Newt, or JVaier-Lizard? 
applied in a Glafs Tube, after the Manner 
directed for the Eel, affords an entertaining 
Profpedt of the Circulation through Num¬ 
bers of fmall Veffels. But nothing can fhew 
it finer than an exceeding fmall Newt f of 
Leeuwen. Arcan* Nat. Tom. pa?. i6qj 
1 *' Phil. Tranf, Numb. 28S. 
K * 
this 
