proceed from an Animalcle of the same kind, and has all its little Members folded up according to their several Joints and Plicatures, which are afterwards enlarged and distended, as we see in Plants. Now tho' this Consideration alone may seem not to bear much weight; yet being join'd to the two former, they do mutually strengthen each other. And indeed all the Laws of Motion, which are as yet discovered, can give but a very lame account of the forming of a Plant or Animal. We see how wretchedly _Des Cartes_ came off when he began to apply them to this Subject; they are formed by Laws yet unknown to Mankind; and it seems most probable, that the _Stamina_ of all the Plants and Animals that have been, or ever shall be in the World, have been form'd, _ab Origine Mundi_, by the Almighty Creator within the first of each respective kind. And he who considers the Nature of Vision, that it does not give us the true magnitude, but the proportion of things; and that what seems to our naked Eye but a Point, may truly be made up of as many Parts as seem to us to be in the whole visible World, will not think this an absurd or impossible thing. But the second thing which later Discoveries have made probable, is, that these Animalcles are originally _in Semine Marium_ & _non in Fœminis_. And this I collect from these Considerations: 1. That there are innumerable _Animalcula_ discover'd _in Semine Masculo omnium Animalium_. Mr. _Leewenhoeck_ has made this so evident by so many Observations, that I do not in the least question the truth of the thing. The reason of their Multitude, and some of the Difficulties which arise thereupon, he has cleared to very good Purpose, so that I shall not repeat them. 2. The observing the Rudiments of the _Fœtus_ in Eggs, which have been fecundated by the Male, and the seeing no such thing in those which are not fecundated, as appears from _Malpighius_ his Observations, make it very probable that these Rudiments proceed originally from the Male, and not from the Female. 3. The resemblance between the Rudiments of the _Fœtus in Ovo_, both before and after Incubation, and the _Animalcle_, makes it very probable, that they are one and the same. The same Shape and Figure which Mr. _Leewenhoeck_ gives us of the _Animalcle_, _Malpighius_ likewise gives of the Rudiments of the _Fœtus_, both before and after Incubation; yea, and even the _Fœtus's_ of Animals do appear so at first to the naked Eye, so that Dr. _Harvey_ does acknowledge that all Animals, even the most perfect, are begotten of a Worm, _De Gen. Anim. Ex._ 18. 4. This gives a rational account of many _Fœtus's_ at one Birth, especially that of the Countess of _Holland_, and how at least a whole Cluster of Eggs in a Hen are fecundated by one Coition of the Male. 5. This gives a new light, as it were, to the first Prophecy concerning the _Messiah_, that the Seed of the Woman shall bruise the Head of the Serpent, all the rest