[ 555 ] 
nay, the particles feem'd to be haddrd up^ together 
fo as that fix of em had made a compound Body, 
I purfu'd this new Inquiry fo far, by reafon that I 
had been for fome time concerned, as if in fome for- 
mer Eflays of this nature I had been guilty of a miftake^ 
in making the particles of the Blood of Fifties to be' 
round, and not oval, fince all that look'd upon em 
with my Glaffes took em to be fuch. 
Tve formerly (aid, and do ftill affirm, that I have 
feen the Blood circulate in VelTels fo fmall, that if a 
particle of Sand were divided into ten hundred thou- 
land parts, one of thefe little parts could not pafs the 
Blood- veiTelj tho 'twere to befuppos'd to be as pliable 
as^ particle of Blood. 
J tried all poilible means to difcover the oval par- 
ticles of Blood, when it circulates freely in the Veins ^ 
and for tliat end pitch'd upon the fmalleft Blcod- veffels 5 
, but notwithftanding the niceft enquiry I could make^ 
I could not fatisfy my felf upon the point : for fome- 
timjes I met with an obfcuredark particle, fometimes 
with a much clearer one ; and when I caft my eye 
upon the fmalleft VelTels in which the Blood did not 
move, and feveral Veffels that I difcover d upon the 
extremity of the Fins, the particles were quite undone, 
fo that I faw nothing but a fimple ftagnating Liquor^ 
.which was a little tindut'd with a bilious colour. 
Heretofore the oval particles of the Blood in Fifties, 
were delineated by the Engraver, according to my or- 
ders, without feeing them himfelf ^ and I likewife 
raix'd the blood with water, by reafon that various 
redning particles hinder a nice view : But for further 
fatisfaftion both to my felf and others, IVe this time 
given the Engraver the Magnifying-Glafs, with the 
blood of the Salmon upon ic, that he may defign em 
.,jiiore exadly according to their appearance to his^ 
own, Eyes, - 
Sfff Fig. 
