[ S s~ 4 ] 
Animals. Thus the Proccfs went on through ali 
\ifiblc Degiees, till I could not any longer purfue 
them with my Glafles : And thus evidently the fper- 
matic are to be clafs’d with the common micro- 
fcopical Animals. 
Hence it is probable, that every animal or vege- 
table Subfiance advances as faft as it can in its Re- 
iolution to return by a flow Defcent to one com- 
mon Principle, the Source of all, a kind of uni- 
verfal Semen ; whence its Atoms may return again, 
and aicend to .a new Life. This common Element 
therefore, tho uniform in its Origin and homoge- 
neous, branches out into innumerable Species more 
and more compounded, more and more heteroge- 
neous, as they depart and are lurther from tnis Source 
of organizd Bodies j yet may a Particle often be ar- 
re.fted, or moulded into other Bodies, long before ic 
attains, which fome perhaps never do, to this ultimate 
Refolution. Nor is there any Danger upon thefe Sup- 
politions of failing into equivocal Generation 5 be- 
caule the fpecific Semen of one Animal can never 
be moulded into another, and Seeds may differ fpc- 
ciflcally from one another by many invifible Prin- 
ciples totally unknown to us, and unattainable bv 
Experiments ; for we are very certain that the 
Power of Glafles, or Force of any Mmftruum we can 
employ, muff Bill leave us at an immenfe Diffance 
from the ultimate Refolution of Bodies, in which 
alone they agree, and are homogeneous. 
I fay therefore the fpecific Seed of one Animal can 
never give another of a different Species 5 for, to be this 
fpecific Seed , it muff have gone through many Changes 
from its firff Origin, and have many Singularities 
peculiar 
