The next Part is the _Cortical Body_; which here in the _Trunk_ is no new substantial formation; but, as is that of the _Root_, originated from the _Parenchyma_ of the _Seed_; and is only the increase and augmentation thereof. The _Skin_, this _Cortical Body_ properly so call’d, and (for the most part) some Fibers of the _Lignous_ mixed herewith, all together make the _Barque_. Next, the _Lignous_ Body, which, whether it be visibly divided into many softer Fibres, as in _Fennel_, and most Plants; or that its parts stand more compact and close, shewing one hard, firm and solid piece, as in Trees; it is in all one and the same Body; and that not formed originally in the _Trunk_, but in the _Seed_; being nothing else but the prolongation of the _Inner Body_ distributed in the _Lobes_ and _Plume_ thereof. Lastly, The _Insertions_ and _Pith_ are here originated likewise from the _Plume_, as the same in the _Root_ from the _Radicle_: So that as to their substantial Parts, the _Lobes_ of the Seed, the _Radicle_ and _Plume_, the _Root_ and _Trunk_ are all one. Yet some things are more fairly observable in the _Trunk_. First, the _Latitudinal_ shootings of the _Lignous Body_, which in _Trunks_ of several years growth, are visible in so many Rings, as is commonly known: For several young Fibres of the _Lignous Body_, as in the _Root_, so here, shooting into the _Cortical_ one year, and the spaces betwixt them being after fill’d up with more (I think not till) the next, at length they become altogether a firm compact Ring; the perfection of one Ring, and the ground-work of another being thus made concomitantly. From these Annual younger Fibres it is, that although the _Cortical Body_ and _Pith_ are both of the same substantial nature, and their Pores little different; yet whereas the _Pith_, which the first year is green, and of all the Parts the fullest of _Sap_, becomes afterwards white and dry; the _Cortical Body_, on the contrary, so long as the Tree grows, ever keepeth green and moist, _sc._ because the said Fibers annually shoot into, and so communicate with it. The Pores likewise of the _Lignous Body_, many of them in well-grown Timber, as in Oaken boards, are very conspicuous, in cutting both lengthwise and traverse; they very seldom run one into another, but keep, like so many several Vessels, all along distinct; as by cutting, and so following any one of them as far as you please, for a Foot or half a Yard, or more together, may be observ’d. These greater Pores, though in Wainscot, Tables, and the like, where they have lain long open, they are but meer Vacuities, and so would be thought to contain only _Sap_ in the Tree, and afterwards only Air; yet upon a fresh cut, each of them may be seen fill’d up with a light and spongie Body, which by Glasses, and even by the bare eye, appears to be a perfect _Pith_; sometimes entire, and sometimes more or less broken.