The Anatomy of Vegetables Begun: With a General Account of Vegetation founded thereon — John Shaqi
The Anatomy of Vegetables Begun: With a General Account of Vegetation founded thereonGrew, Nehemiah
Science
The Anatomy of Vegetables Begun: With a General Account of Vegetation founded thereon
Grew, Nehemiah
Botany -- Pre-Linnean works; Plant anatomy
Dissecting a Bean then, the first Part occurring is its Cuticle. The
Eye and first Thoughts suggest it to be only a more dense and glossy
Superficies; but better enquiry discovers it a real Cuticle. ’Tis so
exquisitely thin, and for the most part so firmly continuous with the
Body of the Bean, that it cannot, except in some small Rag, be distinctly
seen; which, by carrying your Knife superficially into the Bean, and then
very gently bearing upward what you have cut, will separate and shew it
self transparent. This Cuticle is not only spread upon the Convex of the
Lobes, but also on their Flats, where they are contiguous, extending it
self likewise upon both the _Radicle_ and _Plume_, and so over the whole
Bean.
This Part, though it be so far common with the Coats of the Bean, as to
be like those, an Integument; yet are we in a quite different Notion to
conceive of it: For whereas the Coats upon setting the Bean, do only
administer the Sap, and, as being superseded from their Office, then die;
as shall be seen: this, on the contrary, with the Organical Parts of the
Bean, is nourished, augmented, and by a real Vegetation co-extended.
Next to the Cuticle, we come to the _Parenchyma_ it self; the Part
throughout which the _inner Body_, whereof we shall speak anon, is
disseminated; for which reason I call it the _Parenchyma_. The Surface
hereof is somewhat dense, but inwardly ’tis more porous, and of a laxer
Contexture. If you view it in a Microscope, it hath some similitude to
the Pith, while sappy, in the Roots and Trunks of Plants; and that for
good reason, as in _Ch. 2._ shall be seen. This is best seen in green
Beans. See _Fig. 2_.
This Part would seem by its colour to be peculiar to the Lobes of
the Bean; but as is the Cuticle, so is this also, common both to the
_Radicle_ and _Plume_; that is, the _Parenchyma_ of the Bean, as to
its essential substance, is the same in all three. The reason why the
colour of the _Plume_, and especially of the _Radicle_, which is white,
is so different from that of the Lobes, may chiefly depend upon their
being more compact and dense, and thence their different Tinctures. And
therefore the Lobes themselves, which are green while the Bean is young;
yet being old and dry, become whitish too. And in many other Seeds, as
Acorns, Almonds, the Kernels of Apples, Plums, Nuts, _&c._ the Lobes,
even fresh and young, are pure white as the Radicle it self.
But although the _Parenchyma_ be common, as is said, to all the Organical
Parts; yet in very differing proportions. In the _Plume_, where it is
proportionably least, it maketh about three Fifths of the whole _Plume_;
in the _Radicle_, it maketh about five Seavenths of the whole _Radicle_;
and in each Lobe, is so far over-proportionate, as to make at least nine
Tenths of the whole Lobe.
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