1 %% Of viewing the Current 
Blood continues in it fix or fevenHours with 
little Alteration : and, by moiffening it now 
and then with fait Water, may probably be 
continued much longer, 
I can alfo affure you, from my own re¬ 
peated Experiments, that if a large Mufck 
be carefully opened, and a Piece of the thin 
trahfparent Membrane eafy to be found there¬ 
in be (hipped off with a Pair of fharp Sciffars* 
and applied to the Microfcope, the Blood will 
be feen palling through Numbers of Veins 
and Arteries $ and if the Extremity of the 
Membrane be viewed, the true Circulation, 
or the Return of the Blood from the Arte¬ 
ries through the Veins, will be (hewn in a 
delightful and fatisfadfcory Manner, and con¬ 
tinue for a long Time. There are likewife 
other trarifparent Parts of the Mufcle , where 
(he Paffage of the Blood is very difcernible : 
and as Mufcks are to Re got mod Times of 
the Year in London , the Knowledge hereof, 
\vill, I hope, oblige the curious. 
We are told by Mr. Leeuwenhoek, 
that in the fartheft Joints of the hinder Legs 
of little Grxibs he beheld the Blood circu¬ 
late through the Arteries and Veins with 
greater Rapidity than he had ever obferved it 
in any other Creatures and, moreover, that 
the red Globules thereof were twenty-five 
•jL.il ii ivi Arc. kat* Tom. IV. Ep. §4. Again, Ep. 86 . 
i imes 
