[ 29C ] 
obferved, that thofe who have none, or do not c)e(ft 
it according to certain requifite Conditions, are not 
fit for multiplying their own Species: This Semen^ 
I fay, is a Liquid full of fmall Worms. It virould 
be abfurd to deny it : All exaft Obfervators have taken 
Notice of them, and offered to (hew them to the 
incredulous. I have obferved thefe Animalcula io. 
human Semerij in that of feveral Quadrupedes, and 
in that of fome Birds. I have obferved, that the 
Figure of thefe Animalculay as to Birds, was dif- 
ferent from that of other Animals. I have prefetved 
Animalcula in a proportionable Warmth alive for 
feveral Hours; I have obferved their Strength and 
Livelinefs to leifen by Degrees, and at laft intirely 
to ceafe ; and I have obferved them dead, not fwim- 
ing any longer, but always finking to the Bottom. 
I have obferved in the Semen of Men, who had a 
virulent Gonorrhoea upon them, thofe Animalcula to 
be without Motion, and like dead. I might inlargc 
upon the Particulars of a greater Number of Obfer- 
vations ; they all prove the real and confiant Exiftencc 
of Animalcula in the Semen of Males. 
Thefe Worms, according to fome Natural Philo- 
fophers, are true Embry oes. As foon as an Animal- 
culum has entered into an Egg, the Female who 
carries the Egg in her Body, has conceived; Ihe 
harbourc it, nouriflies it, and contributes towards 
the (haping of it, until it becomes an Animal, too 
big to be any longer contained in fo fmall a Place, 
and ftrong enough to bear the Air. 
According to other Natural Philofophcrs, the Eggs • 
that are in the Ovaria of the Females, contain the 
Image, the Type, the Pifture of the Embryo i and the 
fubtil« 
