l $2 Of the Animalcules 
dually extends its Parts, fixes its own Root, 
fhoots above the Ground, and may be faid 
to be born. 
As Difcoveries made by the Microfcope , of 
infinite Numbers of Animalcules in the Semen 
Mafculinum of all living Creatures, and like- 
wife of a Regularity and Conftancy in the 
Farina of each Species of Vegetables, ana¬ 
logous to the faid Animalcules in the Animal 
Semen, have been the principal Means of 
convincing us that all Things are produced 
by Parents of their own Kind, according to 
the eternal and unalterable Laws eftablifhed 
at their firft Creation ; I hope this fhort 
Account of Generation, before my entering 
upon thofe Subje&s, will not be judged im¬ 
proper. 
•—< - ■——- : — ----— 
CHAP. XVI. 
Of the Animalcules in Sbmine - 
Masculino. 
A T the Beginning of the Year 1678, 
Mr. Nicholas Hartsoeker of 
'Rotterdam declared, in a Treatife of Diop¬ 
trics by him then publifhed, that it was 
twenty Years fince he -firft began to examine 
the Semen Mafculinum of feverai living Crea¬ 
tures by the Help of Microfcopes; that, as 
far 
