For upon Enquiry into the Original of a _Branch_ or _Germen_, it appears, That it is not from the _Superficies_ of the _Trunk_, but so deep, as to take with the _Cortical_, the _Lignous Body_ into it self; and that not only from its Circumference, but (so as to take the _Pith_ in also) from its _Inner_ or _Central parts_. Divers whereof may commonly be seen to shoot out into the _Pith_; from which _Shoots_ the surrounding and more superiour _Germens_ are originated; in like manner as the _Lignous Body_ of the _Trunk_ is sometimes principally from those Fibrous _Shoots_ which run along the _Pith_ in the _Root_. The manner wherein usually the _Germen_ and _Branch_ are fram’d, is briefly thus: The _Sap_ (as is said, _Chap. 3._) mounting in the _Trunk_, will not only by its length, but by its breadth also, through the _Insertions_ partly move. Yet, its Particles being not all alike qualified, in different degrees: Some are more gross and sluggish; of which we have the formation of a Circle of Wood only; or of an Annual Ring: Others are more brisk; and by these we have the _Germen_ propagated. For by the vigour of their own motion from the Center, they impress an equal tendency on some of the inner parts of the _Lignous Body_ next adjacent to the _Pith_, to move with them. And since the _Lignous Body_ is not entire, but frequently disparted; through these dispartments, the said interiour Parts, upon their Nutrition, actually shoot; not only towards the Circumference, so as to make part of a Ring, but even beyond it, in order to the production of a _Germen_. And the _Lignous Body_ thus moving, and carrying the _Cortical_ along with it; they both make a force upon the _Skin_: Yet their motion being most even and gradual, that force is such likewise; not to cause the least breach of its parts, but gently to carry it on with themselves; and so partly by the extension of its already existent parts, as of those of Gold in drawing of Guilded Wyer; and partly by the accretion of new ones, as in the enlarging of a Bubble above the Surface of the Water, it is extended with them to their utmost growth. In which growth, the _Germen_ being prolonged, and so displaying its several parts, as when a _Prospective_ or _Telescope_ is drawn out, thus becomes a _Branch_. The same way as the propagation of the Parts of a _Germen_ is contriv’d is its due nutrition also: For being originated from the inner part of the _Lignous Body_, ’tis nourished with the best fermented _Sap_ in the _Trunk_, _sc._ that next adjacent to it in the _Pith_. Besides, since all its Parts, upon their shooting forth, divaricate from their perpendicular, to a cross Line, as these and the other grow and thrive together, bind and throng each other into a Knot; through which Knot the _Sap_ being strain’d, ’tis thus in due moderation & purity delivered up into the Branch.