The Pores of the _Insertment_ are sometimes, at least, extended somewhat more by the breadth of the _Root_, as about the top of the _Root_ of _Borage_ may be seen; and are thus different from those of the _Cortical Body_, which are extended by the length and breadth much alike; and from those of the _Lignous_, being only by its length. The number and size of these Insertions are various. In _Hawthorn_, and some others, and especially _Willows_, they are most extream small; in _Cherries_ and _Plums_ they are large; and in _Damascens_ especially, very fairly apparent. In the _Roots_ of small _Plants_ they are generally more easily discoverable; which may lead to the observation of them in all. These Insertions, although they are continuous through both the length and breadth of the _Root_; yet not so in all Parts, but by the several shootings of the _Lignous Body_ are frequently intercepted. For of the _Lignous Body_ it is (here best) observable, That its several shootings, betwixt which the _Cortical_ is inserted, are not throughout the _Root_ wholly distinct; but that all along being enarch’d, the _Lignous Body_, both in length and breadth, is thus disposed into Braces or Osculations. Betwixt these several shootings of the _Lignous Body_ thus osculated, the _Cortical_ shooting, and being also osculated answerably Brace for Brace, that which I call the _Insertment_ is fram’d thereof. These Osculations are so made, that the Pores of the _Lignous Body_, I think, notwithstanding, seldom run one into another; but, for the most part, still keep distinct; in the same manner as some of the Nerves, though they meet, and for some space are associated together, yet ’tis most probable that none of their Fibres are truly inosculated here, but only in the Plexures. These Osculations of the _Lignous Body_, and so the interception of the Insertions of the _Cortical_, are not to be observ’d by the traverse cut of the _Root_, but by taking off the _Barque_, or the _Cortical Body_. In the Roots of Trees, they are generally obscure; but in Plants, often more distinctly apparent; and especially in a _Turnep_: the appearance whereof, the _Cortical Body_ being stripp’d off, is as a piece of close-wrought Network, fill’d up with the Insertions of the said _Cortical Body_. See _Fig. 8_. The next and last distinct Part of the _Root_ is the _Pith_. The substantial nature thereof, is, as was said of the _Insertment_, the same likewise with that of the _Parenchyma_ of the Seed. And according to the best observation we have yet made, ’tis sometimes existent in its _Radicle_; in which, the two main Branches of the Lobes both meeting, and being osculated together, are thus dispos’d into one round Trunk, and so environing part of the _Parenchyma_, make thereof a _Pith_; as in either the _Radicle_, or the young _Root_ of the great _Bean_ or _Lupine_, may, I think, be well seen.