Sec.. 34. He proceeded from hence to the consideration of all the Species of Animals and found that every Individual of them was _One_. Next he consider'd them with regard to their different Species, _viz_. as Roes, Horses, Asses and all sorts of Birds according to their kinds, and he perceiv'd that all the Individuals of every Species were exactly like one another, in the shape of their Parts, both within and without, that their Apprehensions, Motions, and Inclinations were alike, and that those little differences which where visible amongst them, were inconsiderable in respect of those many things in which they agreed. From whence he concluded, that the Spirit which actuated any Species was one and the same; only distributed among so many Hearts, as there were Individuals in that Species, so that if it were possible for all that Spirit, which is so divided among so many Hearts, to be Collected into one Receptacle, it would be all the same thing, just as if any one Liquor should be pour'd out into several Dishes and afterwards put all together again in one Vessel; this Liquor would still be the _same_, as well when it was divided, as when it was altogether, only in respect of that division it may be said in some sort to be Multiplied. By this way of Contemplation he perceiv'd that a whole Species was One and the same thing, and that the Multiplicity of Individuals in the same Species is like the Multiplicity of Parts in the same Person, which indeed are not _many_ [i.e. are only _One_.] Sec. 35. Then he represented in his Mind, all the Several kinds of Animals, and perceiv'd that Sensation, and Nutrition, and the Power of moving freely where they pleas'd, was common to them all; which Actions he was assur'd before, were all very proper to the Animal Spirit, and that those lesser things in which they differ'd (notwithstanding their agreement in these greater,) were not so proper to that Spirit. From this consideration he concluded, that it was only One and the same Animal Spirit, which Actuated all living Creatures whatsoever, tho' there was in it a little difference, which each Species claim'd as peculiar to it self. For instance, suppose the same Water be pour'd out into different Vessels, that which is in this Vessel may possibly be something warmer than that which is in another, tho' 'tis the same Water still, and so every degree of Heat and Cold in this Water in the Several Vessels, will represent the Specifick difference which there is in Animals: And as that Water is all one and the same, so is that Animal Spirit _One_, tho' in some respect there is a sort of Multiplicity. And so under this Notion he look'd upon the whole Species of living Creatures, to be all _One_.