The Pores of the _Pith_ likewise being larger here in the _Trunk_, are better observable than in the _Root_: the width whereof, in comparison with their sides so exquisitely thin, may by an Honey-Comb be grosly exemplified; and is that also which the vast disproportion betwixt the Bulk and weight of a dry _Pith_ doth enough declare. In the _Trunks_ of some Plants, they are so ample and transparent, that in cutting both by the length and breadth of the _Pith_, some of them, even to the bare eye would seem to be considerably extended by the length of the said _Pith_; which once I also thought they were, and that only the rest of them were but short and discontinuous, and as ’tis said, somewhat answerable to the Cells of an Honey-Comb. This was the nearest we could come to them, by conjecture, and the assistance of the best Glasses we then had by us, when upon enquiry into the nature of the _Pith:_ But that Worthy Person newly mentioned Mr. _Hooke_ sheweth us, that the Pores of the _Pith_, particularly of _Elder-Pith_, so far as they are visible, are all alike discontinuous; and that the _Pith_ is nothing else (to use his own words) but an heap of Bubbles. Besides what this Observation informs us of here, it farther confirms what in the second Chapter we have said of the Original of the _Pith_ and _Cortical Body_, and of the sameness of both their natures with the _Parenchyma_ of the Seed. For, upon farther enquiry with better Glasses, I find, that the _Parenchyma_ of the _Plume_ and _Radicle_, and even of the _Lobes_ themselves, though not so apparently, is nothing else but a Mass of Bubbles. In the _Piths_ of many Plants, the greater Pores have some of them lesser ones within them, and some of them are divided with cross Membranes: And betwixt their several sides, have, I think, other smaller Pores visibly interjected. However, that they are all permeable, is most certain. They stand together not indeterminately, but in even Ranks or Trains; as those of the Insertions by the breadth, so these by the length of the _Trunk_. And thus far there is a general corresponding betwixt the part of the _Root_ and _Trunk_: Yet are there some considerable Disparities betwixt them; wherein, and how they come to pass, and to what especial use and end, shall next be said.