far the thinnest, so is it the most dense, white, smooth and simple. The Original is from the _Pith_; difficult, but curious to observe: For the _Seed-Branch_, not striking directly and immediately quite through the _Basis_ of the _Stone_, but in the manner as is above described, carries a considerable part of the _Pith_, now gathered round about it, as its _Parenchyma_, along with it self, which, upon its entrance into the concave of the _Stone_ about its farther end, is there in part spred all over it, as the Lining thereof. The outer and very much thicker Part consisteth partly of the like _Precipitations_ or concrete Particles, as in a _Pear_, being gathered here much more closely, not only to a Contiguity, but a coalition into one entire Stone; as we see in _Pears_ themselves, especially towards the _Cork_, they gather into the like Stoniness; or as we see a _Stone_, _Mineral_ or _Animal_, oftentimes the product of accumulated _Gravel_: But as the _Parenchyma_ is mixed with the Concretion in the _Calculary_, so is it also, though not visibly, with these in the _Stone_, the ground of the _Stone_ being indeed a perfect _Parenchyma_; but by the said Concretions so far alter’d, as to become dry, hard and undistinguishable from them. In a _Nut_ (to which an _Achorn_ is analogous) there are three general Parts, the _Cap_, _Shell_ and _Pith_. The _Cap_ is constituted of a _Pill_ and _Parenchyma_ derived from the _Barque_, and _Ramulets_ from the _Lignous Body_ of the _Branch_. The _Shell_ likewise is not one simple Body, but compounded. The Superficial Part thereof is originated from the _Pill_ or _Skin_ of the _Cap_, from the inside whereof it is in a Duplicature produc’d and spred over the _shell_: which, if you look at the _Basis_ of the _shell_, is farther evident; for that being continuous with the _Parenchyma_ of the _Cap_, without the interposure of the _Skin_, the said superficial Part is there wanting. The thicker and inner part of the _shell_ consisteth of the same _Parenchyma_ as that of the _Cap_, with a _congeries_ of _Precipitations_ filled up, as in a Stone. And as the _Lignous Body_ is branched in a Stone, so, with some difference, in a Shell. The _Outer Branches_ or _Ramulets_ are numerous, each issuing out of the _Parenchyma_ of the _cap_, and entring the _Shell_ at the Circumference of its _Basis_ and so running betwixt its superficial and inner parts towards its _cone_, in a Round. The _Inner_ or _Seed-Branch_ is single, entering in, as do the other, at the _Basis_ of the _shell_, but at the _center_ thereof; from whence it runs, not through the _Shell_, as in _Plums_ through the _Stone_; but through the _Pith_, as far as the _cone_, where the Coats of the _Seed_ hang appendent to it. The _Pith_, whether derived from the same part both in name and nature in the _Branch_ and _Stalk_, or from the _Cortical Body_, I yet determine not.