cm ) 
thefe Tefticles, and this will determine whether they be 
abfolutely neceffary for the formation of Animals, 
There are fome difficulties propofed againft this Con* 
jefture, which I think may be eaBly refolved. Some 
objeft the diftance between the Tuba or Cornun ZJterl 
and the Tefticles ; but to this is oppofed by Swammer- 
dam and others, th« like diftance between the hftndi- 
buhm, in Hens and Frogs, and the Ovary, and yet it 
cannot be denied that the Eggs are tranfmitted thro this 
into the Uterus: and befides R,de Graef, and others, have 
by repeated Obfervations found that the Cornua Vteri 
do at certain times after Conception, embrace the Teftes 
on both fides the £>/eraf.They objedt in the fecond place 
the great difproportion between the pretended Eggs in 
the Ovary, and the Aperture of the Tuba or Cornua 
Vteri^ the former being a great deal bigger than the lat- 
ter : but both R. de Qraef and Malpighius have cleared 
that matter by making appear, that thefe Bladders in the 
Ovary are not the Ova, bjit ferve to form the Glandules 
within which the Ova are formed, which break through 
a fmall Papilla opening in the Glandule, which bears a 
proportion to the Aperture of the Tube. Theyobje<& 
3. The difficulty to conceive how thefe Eggs (hould be 
impregnated per femen Maris, both becaufe there is no 
Connexion between the Tuba and the Ovary for its 
tranfmiffion, and for that Dr. Harvey could never dif- 
cover any thing of it in Vtero. As to the laft, Mr. 
heewenhoec\ has cleared that difficulty by the difcovery of 
innumerable AnimalculaSeminis Maris inCornubns Uteri, 
and thofe living a confiderabletime after Coition. Numb. 
1 74. of the Tranfaff. And as to the former we may either 
fuppofe that 'there is fuch an Inflation of the Tuba or 
Cornua uteri tempore Coitionis, as makes them embrace 
the Ovaria, and fuch an approach of the ZJ/m/J and its 
Cornua, as that it may eafily tranfmit the Seed into the 
Ovary * or elfe that the Ova are impregnated by the 
D 2 Animakles 
