We have only to resolve a grain of corn into its
component elements to realize the potency and scope of chemistry. Then
if we inquire into the sources of these elements as they have come from
the soil to form this grain of corn, the indispensability of a knowledge
of chemistry will become more apparent. In our explanations we shall
soon come upon capillary attraction, and the person is dull, indeed, who
does not stand in awe before the mystery of this subject. If we broaden
our inquiry so as to compass the evolution of an ear of corn, we shall
realize that we have entered upon an inquiry of vast and fascinating
import. The intricate and delicate processes of growth, combining, as
they do, the influences of sunshine and moisture and the conversion into
food products of elements whose origin goes back to primeval
times,--these processes are altogether worthy of the combined
enthusiasms of scientist and poet.
=Physiology.=--But no mention has been made, as yet, of the science of
physiology, which, alone, requires volumes. We have but to ask how wheat
is converted into brain power to come upon a realization of the
magnitude of the study of this science. We have only to relax the leash
of fancy to see that there are no limits to the excursions that may be
made in this field. If we allow fancy to roam, taking the _a posteriori_
course, we might begin with "Paradise Lost" and reach its sources in
garden and field, in orchard, and in pasture where graze flocks and
herds.
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