Of which I take the reason (excluding a _Parenchyma_ now) to be this. When an Oxe or a Cow is grown old, and in an indifferent plight as to his _flesh_ (for so it is called) all those Vessels having been kept at that size for the most part, have contracted a tenseness and firmness, and their _fibers_ less extensive, nor so fitted for the reception of more unctuous particles to relaxe them; and that additional unctuous matter, which occasions fatness, is forced to seek new quarter any where (often remote from Muscles) where it can be with least difficulty received; sometimes to one place, sometimes to {319} another, as may be seen in Shambles. Whereas, if there were such a thing as a _Parenchyma_, that certainly would, like a hungry Sponge, immediately swell up in several parts, (which without much difficulty might be discover'd in the dissection) and more eminently, where it should find the pores most potent: And in the dissection of such Muscles it would be very strange, not to find some, if not many, pieces of them in various shapes, to the great inconvenience of the parts, in which they are seated: Which yet I confess I could never find in any Muscle unless it were where there had been a _Contusion_, or an _Impostume_, or the like. But according to my opinion of the _Parenchymous_ parts, the reason, why the Flesh of a very lean Ox or Cow, that hath got new Flesh in a good pasture, eats tenderer, seems to be this: That in a very lean Beast the Vessels designed for admitting and distributing the nourishing Juice, are so near contracted, and lye so close together; that, when once they are relax'd; by fresh and unctuous nourishment, they extend every way in all _extensive_ parts, until in a short time the whole Creature is, as it were, created a new, having got new flesh upon old bones. And the necessity of extreme extension makes all those parts, that are, as has been said, for the admission of nourishment, so thin and fine, that it will make the lean Beast, put into a rich pasture, eat young and tender: Whereas one of the same Age, that never was very poor, fed in the same pasture, shall eat hard and tough.