Falling in Love; With Other Essays on More Exact Branches of ScienceAllen, Grant
Science
Falling in Love; With Other Essays on More Exact Branches of Science
Allen, Grant
Science
its other end pushes its way out through the soft hole, and then gives
birth to a growing bud at the top--the future stem and leaves--and to a
number of long threads beneath--the future roots. Meanwhile, the spongy
mass inside begins gradually to absorb all the nutty part, using up its
oils and starches for the purpose of feeding the young plant above,
until it is of an age to expand its leaves to the open tropical sunlight
and shift for itself in the struggle for life. It seems at first sight
very hard to understand how any tissue so solid as the pulp of coco-nut
can be thus softened and absorbed without any visible cause; but in the
subtle chemistry of living vegetation such a transformation is
comparatively simple and easy to perform. Nature sometimes works much
greater miracles than this in the same way: for example, what is called
vegetable ivory, a substance so solid that it can be carved or turned
only with great difficulty, is really the kernel of another palm-nut,
allied to the coco-palm, and its very stony particles are all similarly
absorbed during germination by the dissolving power of the young
seedling.
Why, however, has the coco-nut three pores at the top instead of one,
and why are two out of the three so carefully and firmly sealed up? The
explanation of this strange peculiarity is only to be found in the
ancestral history of the coco-nut kind. Most nuts, indeed, start in
their earlier stage as if they meant to produce two or more seeds each;
but as they ripen, all the seeds except one become abortive. The almond,
for example, has in the flower two seeds or kernels to each nut; but in
the ripe state there is generally only one, though occasionally we find
an almond with two--a philipoena, as we commonly call it--just to
keep in memory the original arrangement of its earlier ancestors. The
reason for this is that plants whose fruits have no special protection
for their seeds are obliged to produce a great many of them at once, in
order that one seed in a thousand may finally survive the onslaughts of
their Argus-eyed enemies; but when they learn to protect themselves by
hard coverings from birds and beasts, they can dispense with some of
these supernumerary seeds, and put more nutriment into each one of those
that they still retain. Compare, for example, the innumerable small
round seedlets of the poppyhead with the solitary large and richly
stored seed of the walnut, or the tiny black specks of mustard and cress
with the single compact and well-filled seed of the filbert and the
acorn. To the very end, however, most nuts begin in the flower as if
they meant to produce a whole capsuleful of small unstored and
unprotected seeds, like their original ancestors; it is only at the last
moment that they recollect themselves, suppress all their ovules except
one, and store that one with all the best and oiliest food-stuffs at
their disposal. The nuts, in fact, have learned by long experience that
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