copy lasts, the Dog perceives the sent, but if he doth not follow or hunt readily, then there is either no perfect copy made by the ground, or otherwise he cannot find it, which causes him to seek and smell about until he hath it; and thus smell is not made by the motion of the air, but by the figuring motions in the nose: Where it is also to be observed, that not onely the motions in one, but in millions of noses, may pattern out one little object at one time, and therefore it is not, that the object of sent fills a room by sending out the sent from its substance, but that so many figures are made of that object of sent by so many several sensitive motions, which pattern the same out; and so the air, or ground, or any other creature, whose sensitive motions pattern out the object of sent, may perceive the same, although their sensitive organs are not like to those of animal Creatures; for if there be but such sensitive motions and perceptions, it is no matter for such organs. Lastly, it is to be observed, That all Creatures have not the same strength of smelling, but some smell stronger, some weaker, according to the disposition of their sensitive motions: Also there be other parts in the body, which pattern out the object of sent, besides the nose, but those are interior parts, and take their patterns from the nose as the organ properly designed for it; neither is their resentment the same, because their motions are not alike, for the stomack may perceive and pattern out a sent with aversion, when the nose may pattern it out with pleasure. And thus much also of Sent; I conclude and rest, Madam, _Your faithful Friend,_ _and Servant._ [1] _Ch._ 29. _art._ 12. XXIX. _MADAM,_