Royal Societv. 47p 
broke fo, that he could neither fee them nor thofe, of which 
fix conftitured a particle of blood, but only a fimple fluid of a 
faint colour running along the veflels^ but in a large artery at 
the tail, the blood moved fo llowly, that he could eafily dif- 
cern the particles were oval ; nay not only lo, but he likewife 
perceived more clearly than before, the globules that confti- 
tute the oval particles, if not always, yet at leaft for the moft 
part: For it is eafy to conceive how fix little globules, which 
are pliant, always in motion, and driven one upon the other 
fhould unite in the fafliion of a bowl ^ thus Plate Xllf Fig. 28, 
reprefents the firft coalition of the fix little globules into one : 
M. Leeyoenhoeck made upfuch a globe as the hift figure repre- 
fents of fix wax balls put together, to fhew the' form and 
compofition of the little globular particles of the blood ; and 
befides, he is perfuaded that each of thefe little globules of 
blood is at leaft compounded of fix and thirty others ; thefe 
little balls being moved, and Iqueezed together, and being 
at the fame time pliant, and compacted into one compleat 
round form, are reprefented Fig. 29. 
From fuch a fcheme we may conceive how the globular 
parts of men's blood, and other animals acquire a roundnefs • 
but how the oval particles are compounded of fix globules is 
not fo eafy to apprehend 5 and fhould we divide one of thefe 
globules by our imagination into fmaller and fmaller parts, 
the little particles that enter into the compofition will flill be 
inconceivably fmaller , yet fuppofing we could dilcover the 
figure and ihape of parts lefs than a globule of blood by a 
1000,000,000, M. Leeiscenhoeck thinks v^e would ft'lll be far 
from reaching the firft conftituent parts : As he afferted above, 
that the particles of blood are by a prefTure disjoined and uni- 
ted with the fluid matter in which they move, fo that the 
whole appears as a fimple fluid liquor 5 in like manner we may 
eafily imagine, that when a horfe ftrains, and compreffes his 
breaft in drawing a heavy load, the globules of blood are dif- 
folved in the midft of the velTels, where the greateft prefTure 
is, and are as it were confounded and united with the Serum: 
M. Leewenhoeck thinks, that perhaps the diffolved particles, 
when freed from the abovementioned prefTure, may return to 
their former figure 5 juft as when a piece of fat is laid in fuch 
a heat, that its particles, which nearly refemble the globules 
of the blood, are difTobed by the fire, and turn into a clear 
cryftalline hquor, vifible by a magnifying-glafs ; and as foon 
as the melting heat is gone from the fat, it prefently returns to 
its 
