C ^71 ) 
thefe Obfervations, I learned no more then I told yoa 
before. 
On the loch day of Ju?te, when (bme little Boys 
went down into the Town Ditch, and were bufie to 
fech up feme green Herbs, and to find finall Eels among 
them of feverai bignefles, I defired them to bring me a 
pot full of the fmalleft of them to my Houfe, which 
they did accordingly, that I might fearch them very 
narrowly, to try whether I could fee any more concern- 
ing the Circulation of the Blood, then I had difcovered 
before in greater ones. 
r The fmalleft fort of thefe they brought to me, were 
about two Inches and an half long, and their Bodies 
were in proportion fmaller then that of the great ones. 
, The reft were of feverai lengths, and the biggeft of 
them about five Inches long. 
I took feverai of theleaft fort, and put them into my 
fmallTube (partly filled with Water) fothat they could 
but juft go into it. 
When I fixed thefe fmall Eels before the Glafs, and 
fixed my Eye upon the Fin near the Tail, I faw with 
greater admiration then ever I did in my Life before, 
the Circulation of the Blood, and that in fo many Sun- 
dry places fo that if I ftiould delineate the little fpace 
composed thereof, it would not feem credible to moft 
Men : And when I came to contemplate- the end of 
the Bone, I (aw, that very near to the jointing of the 
laft Joint, many very fmall Veins did meet together, and 
make there one great one, when I took it tor granted, 
that there was a Valvula^ for there was a ftrange and 
quick pulhing forwards, after fuch a manner, as if we 
faw our Blood pulht forwards in an Artery before our 
Eyes : Nay, this puftiing forwards was fo quick one af- 
ter the other, that with our Mouth we could not fo 
quickly pronounce one Syllable after another : Inftiort, 
S s a this 
