C S49 } 
tus Vrinarius where it has an open DuUus^ and of the 
manner oi the impregnation of the Eggs in Women: 
and here he adds an account of a Superfaetation obftrved 
in 1689 ; asalfo, of imperfed: conceptions, in one of 
which 'cis ob(ervable that it wanted the Head and Legs, 
^but had the Heart with the Aorta and Cava, the rudi- 
ments of the Lungs . vifibie. After feme other 
Oblervations about Veficks in the Vterus of Women, 
he delcribes a monftrous Hen Egg, containing four 
Eggs in one, with their Yolks, Whites, and Secundines: 
This our Author parraiels with an obfervation of a 
' monftruous Limon, and proceeds to give an account 
of the caufe of thefe Produftions or Superf^tations, 
from ftveral faccciTive conceptions in the Vterm^ and 
compares this to the formation of a fort of Stone that 
feems to contain, or be made up of feveral others in- 
cluded in it. ^ 
Our Author in the next place treats of the motion 
of the Blood which he obferved in Frogs to move from 
the extream parts of the Body, and capillary Veins into 
larger and larger Veflels till it came to the Heart, he 
likewife finds, that the motion is fometimes inverted 
and fometimes (lands ftill, which is fupplied by the fre- 
quent Anaflomofes of the Veflels ; nor does it keep the 
fame pace in all the Veins, moving much flower in thofe 
that are winding than in ftrait ones. There are feveral 
other curious Obfervations of the Blood and its Circu* 
lations. 
Next follow feveral Obfervations upon the Hairs of 
Animals, which are Plants Sui Generis have a bulbous 
Root and Vegetate, here he inferts an account of an 
Hair Ball found in the Womb ck a Woman, and another 
under the Skin of an Ox. Hence he comes to treat of 
the Hairs, Feathers, and Quills of Birds, which he does 
with hisufual accur.icy, and ends with his Obfervati- 
ons 
