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on the Fiftb Day the Rudiments of thc Head and Body do appear. Thismade Dr. Harvey Conclude, that the Blood had a Being besore any otherPart of thc Body, and that from it all the Organs of the Foetus were bothFormcd and JSlouriflted ; but by Malptgbiue’s Observation«, we lind that thcFarts are then only Io far Extcnded, as to be made visible co the Naked Eu,and that they were actually Existent besore, and discernable by Glajjts.After an Incubatim of 30 Hours, are to be feen the Head, the Eyes, and theCarina, with the Vertebra, distinct, and the Heart. Aster 40 Hours its Pulseis visible, and ali the other Parts more distinct, which cannot be discerned by. the Naked Eye besore the beginning ol the Fisth Day ; from whence itseems very Probable that even the so early Diseovery of thole parrs of theFoetus, by the Microscope, is not the Diseeming of Parts newly Formed,but only more Dilated and Extended by receiving of Nutriment from theColliquamentum ; so that they scem all to ha ve been actually Existent be-fore the Incubation of the Hm. And what Swanmerdam has diseovered inthe Transmutation of InjeQs, gives no sinall Light to this, whilst he makesappear in the Explanation of the 1 %th Table of the General History of Infitts,that in thole Large Erucas which Feed upon Cabbage, if they be taken a-bout the time they Retire to be Transformed into Aurelias, and Plunged os-ten in Warnt Water to make a Rupture of the Outer Skm, you will diseernrhrough thc Transparency of their Second Membrane , All the Parts of theButterfly, the Trunk, Wings, Feelers, &c. folded up : But, that aster theEruca is Cbanged into an Aurelia, none of thele Parts can be Discerned,they are so drestcht with Moisture, though they be there ActuallyFormed.

Another Consideration is from the Analogy, which we may supposc, be-tween Piants and Animali. All Vtgetables we lee, do Proceed ex Plan-tula, the Seeds of Vegetables being nothing eise but Linie Plant s of the fameKind folded up in Coats and Membranei ; and from hence we may pto-bably Conjecture, that so curioufly an Organized Creature as an Animal, isnot the fudden Product of a Fluid, or Colliquamentum, but does much ra- ,ther proceed from an jnimalcle of the Jame Kind, and has all itslittle Mem-bers Folded up according to their scveral Joints and Plicatures, which areafterwards Enlarged, and Distended, as we lee in Pianti. Now though thisConsideration alone may scem not to bear much weigbt, yet being Joined tothe two former, they do mutually strengthen each other. And indeed allthe Laws of Aiction which are as yet Dilcovered, can give but a very LameAccount of the Formmg ot a Piant or Animal, We lee how wretchedly DesCartes came off when he began to Apply them to this Subject. Tbcy areFcrmed by Laws yet Unknown to Mankind ; and it seems most Probable,that the Stamina of ali the Plants and Animali that have been, or everfhall Be in the World^ have been formed ab Origine Mtmdi, by the AlmigbtyCreator within the First of Each Refpective Ktnd. And he who considers theNature of Vision, that it does not give us the True Magmtude, but the. ’ Proportiou of Things, and that what seems to our Naked Eye but a Point,

may