[ 663 ] 
§35'- ^ fhall conclude therefore with fummirig 
up my Syftem in a few Words : I fuppofe all Semen 
of any kind to be an exalted Portion of animal or 
vegetable Matter, fecrcted from the Aliment of every 
generating Subject, when it is adult, and no further 
Demand is made for its Increafe and Growth ,• this 
l fuppofe to be endued with a proportionable vege- 
tative Force 5 to be various in various Circumftances, 
and heterogeneous in different Subjects j but to be 
uniform in its Productions, when it falls into a pro- 
per Matrix , where it finds Matter to affimilate, of 
a Quality and in a Quantity fufficient to form that 
Ipecific Being; whilft in other Circumftances, it will, 
if it extravafates, by the fame vegetating Force, yield 
all the feveral Phenomena I have above taken notice 
of. And thus, if I am not miftaken, I have ob- 
tained what I firft intended to make out, that the 
fpermatic Animals are not the efficient Caufc of Ge- 
neration, but only a nccelfary Confequence of Prim 
ciples in the Semen y which Principles arc neceflary 
to Generation. 
Thus have I connected my Syftem with our Coun- 
tryman Dr. Harvey's Obfcrvation of that fine Tiflue, 
or Web-like Expanfion, obferv’d in the Uterus of 
Does, in the Center of which the Embryo Foetus , 
invefted with its Amnion and Chorion , was found to 
be lodg'd : For let the Vegetation begin from the 
Semen , and continue to affimilate the affluent Mat- 
ter from the Matrix wherein it has taken Root, 
and the Fawn muft come forth like any other fpe- 
cific Animal or Plant. J 
I (hall only obferve, that Lewenhoeck had difeo* 
ver'd this vegetating Power in the Semen , and had, 
7 * like 
i 
