little Rivulets have their confluence into the Great Vein, the common chanel of the Blood? Are fuch oppofite motions both equally mechanical, when in both cafes the Matter was under the fame modification? And again, When the first Ferment is excited, and forms the left Ventricle, if the Fluid Matter be uniform and of a fimilar texture, and therefore on all fides equally refift the Expansion; then the Cavity muft continue One, dilated more and more, 'till the expanfive force and the uniform refiftance be reduced to an equality, and fo nothing at all can be formed by this Ferment, but a fingle round Bubble. And moreover this Bubble (if that could make a Heart) by reason of its comparative Levity to the Fluid that inclofes it, would neceffarily afcend to the top; and consequently we should never find the Heart in the midst of the Breast. But if the Fluid be supposed to confift of Heterogeneous Particles, then we cannot conceive how thofe diffimilar parts should have a like fituation in two several Fluids, when the Ferment begins. So that upon this fuppofition there could be no Species of Animals, nor any Similitude between them: One would have its Lungs, where another hath its Liver, and all the other Members præpofteroufly placed; there could

not be a like Configuration of Parts in any two Individuals. And again, What is that which determins the Growth of all living Creatures? What principles of Mechanifm are fufficient to explain it? Why do not all Animals continually increase in bignefs during the whole space of their Lives, as it is reported of the Crocodile? What fets a bound to their ftature and dimenfions? and if we fuppofe a Bound and Ne plus ultra to be mechanically fixed, why again fo great a variety in the Bulk of the feveral Kinds? why also fuch Conftancy observed in that manifold Variety? For as fome of the largest Trees have Seeds no bigger or less than fome diminutive Plants, and yet every Seed is a perfect Plant with Truck and Branches and Leaves inclosed in a Shell: So the first Embryon Swam- of an Ant is fuppofed by inquifitive Naturalifts Hiftor. In- to be as big, as that of an Elephant, and to Sect. p 3. promise as fair at its primitive Formation for

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as fpacious a Body: which nevertheless by an immutable degree can never arrive to the millionth part of the others Bulk. And what modification of the first liquid Matter can vary fo much, as to make one Embryon capable of fo prodigiously vaft augmentation, while another is confined to the minutenefs of an Infect? Is not this manifeftly a Divine Sanction that hath

fixed and determin'd the Shape, the Stature, the Appetites, and the Duration of all Creatures in the World? Hither muft we have recourse in that great and mysterious Affair of an Organical Formation: And I profefs that I cannot difcern one step in the whole, that is agreeable to the natural Laws of Motion. If we confider the Heart, which is supposed to be the first principle of Motion and Life, and mentally divide it into its constituent Parts, its Arteries and Veins and Nerves and Tendons and Membranes, and the innumerable little Fibres, that thefe Secondary Parts do confift of; we shall find nothing here Singular, but what is in any other Muscle of the Body. 'Tis only the Site and Pofture of their several Parts and the Configuration of the whole, that give it the Form and Functions of a Heart. Now why should the first single Fibres in the Formation of the Heart be peculiarly drawn in Spiral Lines; when the Fibres of all other Mufcles are made by a transverse rectilinear Motion? What could determin the Fluid Matter into that odd and fingular Figure, when as yet no other Member is fuppofed to be form'd, that might design the Orbit of its Courfe? Let Mechanism here make an experiment of its Power, and produce a spiral and turbinated motion of the whole moved

Body without an external Director. When all the Organs are once framed by a supernatural and divine Principle, we do willingly admit of Mechanifm in many Functions of the Body: but that the Organs themselves fhould be mechanically formed, we conceive it to be impoffible and utterly inexplicable. And if any Atheist will give a clear and philofophical account of the things that are here touch'd upon; he may then hear of many more and perhaps more difficult than thefe, which their unfitness for a popular Auditory, and the remaining Parts of my Subject, that prefs forward to be treated of, oblige me now to omit.

But as the Atheist, when he is put to it to explain, How any Motion of dead Matter can beget Thought and Perception, will endeavour to defend his baffled Impiety with the instance. of Brutes, which he calls Thinking Machines: fo will he now also appeal from the Arbitration of Reason in the Cafe of Animal Productions, to Example and Matter of Fact. He will declame to us about the admirable Structure of the Bodies of Infects; that they have all the Vital Parts, which the largest of Quadrupeds and even Man himself can boast of; whofe Fabrick they the rather excell in his opinion, for

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that very Minutenefs, that makes them contemptible: and that one would be apt to imagin, that thefe elegant and elaborate little Engines were all now propagated by Generation, and at first produced by fome Divine Wisdom and Power; if we did not find by experience, that they are the eafie and obvious Products of unintelligent Nature, that fpontaneously and mechanically forms them out of putrefied Garcaffes and the warm moisture of the Soil: and yet (which is mightily to his purpose) that these Infects, fo begotten without Parents, have nevertheless fit Organs of Generation and Difference of Sex, and can propagate their own kinds, as if themselves had been born so too: and that: if Mother Earth in this her barrenness and decrepitness of Age can procreate fuch fwarms of curious Engins, which not only themselves enjoy their portion of Life, but by a most wonderfull Inftinct impart it to many more, and continue their Species: might he not in the flower of her Youth, while fhe was fucculent and fertil, have produced Horfes and Elephants and eyen Mankind it felf, the largest and perfectest Animals, as easily as in this parched and fteril condition fhe can make a Frog or an Infect? Thus he thinks, he hath made out from Example and Analogy, that at the Beginning

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