[ 557 1 
I likewife placed thefe particles of the Blood of a 
little Butt, pafted upon a clean Glafs, before a Mag- 
nifying Glafs, where they ftand magnifyed to the 
above-mention'd degree ^ in order to be capable to 
oblige any Gentleman with the fight, tho 'twere on 
the cloudieft day in Winter, without any artificial 
light. 
Thefe particles which are diftinguiflied by little 
ftiining fpots in the middle, are delineated fig, 4, be- 
twixt Gand H. 
Moreover, I put the blood upon the Glafs to a 
greater Magnifying Glafs, the thinner moifture arifing 
from the (To called J ferous matter, and the ovaWike 
Blood being exhal'd 5 fo that lome fmall oval parti- 
cles were to be feen, that were fo far from running 
together, that they did not touch one another, and 
plainly difcover'd themfelves to cpnfift of fix little 
globular particles, which the defigner has imitated, to 
the ttmoft of his power, in fig. 5. between I and K. 
In purfuance of this new Obfervation, I apply 'd my 
felf to view the circulation of the Blood with Glafles, 
more magnifying than any I have yet ufed 5 which at 
laft I have fully compleated 3 as well as the evidence 
of the oval particles. Npw the greater the magnify- 
ing Glafs is, the fwifter does the circulation of the 
Blood appear in the Velfels. Having retarded this 
motion , I imploy'd two or three feconds of time in 
obferving the little Veins, and found that in feveral 
fmall Veflels the oval particles were fo undone, that I 
could neither fee them nor thofe of which fix had made 
up a particle of Blood 5 but only a fimple fluid mat- 
ter, with a faint colour running along the Veflels ^but 
in a large Artery at the Tail, the Blood mov'd fo flow- 
ly, that I could eafily difcern that the particles in that 
Veflel were oval 5 nay, not only fo, but I likewife 
perceived more clearly than before, the little Globes, 
Sfff2 that 
