t 7® ] 
fomc Moderns^ concerning Superfetation (any coa- 
fiderable Time after the Uterus has received one (or 
more) impregnated Ovum) is altogether groundlefs : 
For, when the Tubes are grown flaccid, after having 
conveyed the Ovum to its Receptacle, and loft their 
vermicular Flexures, they can no more embrace the 
Ovaria during that Pregnancy ; and alfo becaufe the 
Ovarium on each Side is driven by the Diftenfton of 
the Uterus to a greater Diftance (out of its former 
Situation) from the Vagina y and confequently out of 
the Reach of Impregnation. 
XVIII. 
Therefore, whenfoever it happens that two Foetus’s 
are brought forth at different Times, they both come 
within the common ftated Time of Geftation ; that 
is within nine Months, or thereabout, from the Coit 
tfa’at produced the Fecundations In which Cafe* tho’ 
one may be perfed, and come at the full Time, the 
other is impeded, and fometimes wafted, and corner 
before the due Time, being both begotten at the fame 
Inftanf, or within a very little Time of one another. 
But becaufe one fhall have more Nutrition deter- 
mined to it, the other lefs, the latter, which is al- 
ways fituated ncareft the Orifice, will of Neceflity 
fuffer Abortion. Thus, different E millions of Chil- 
dren happen, not becaufe they are begotten at dif- 
ferent Times, but becaufe. Nutrition being unequally 
diftributed, the defrauded Foetus is extruded by the 
other, who often keeps his Place till he arrives at 
due Pcrfcdion. 
XIX. 
