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PHYSIOLOGY
AND
DIET.
43
habit,
surroundings,
and
training.
Children
fancy
cer-
tain
articles
of
food
and
dislike
others,
because
other
members
of the
family
do
the
same.
That
taste
may
be
developed,
especially
when
assisted
by
the
sense
of
smell,
is
seen
in
expert
tea
and
wine
tasters.
Although
the
sense
of
smell
is
in
man
not
so
acute
as
the
other
senses,
and
its
impressions
often
need
to
be
confirmed
by
the
others,
we
would
be
very
wrong
to
undervalue
it.
Odors,
to
be
recognized,
must
be
presented
in
a
gaseous
form,
when
they
are
forcibly
drawn
up
by
inspiration
into
the
higher
portions
of
the
nasal
fosses.
There
is
no
doubt
that
the
sense
of
smell
may
be
highly
developed,
especially
in
conjunction
with
other
senses,
or
in
case
these
are
deficient.
It
is
related
that
a
certain
blind
and
deaf
mute
was
able
to
recog-
nize,
by
the
sense
of
smell,
any
person
with
whom
he
had
previously
come
into
contact.
Every
part
of
an
organism
is
subject
to
certain
alter-
ations,
caused
by
mechanical
or
chemical
action;
it
gradually
ceases
to
work
when
the
products
of
reaction
are
not
eliminated,
and
the
loss
of
material
is
not
equaled
by
fresh
nutritives.
Accordingly,
we
may
say
that
the
natural
condition
of
every
organism
depends
upon
digestion
and
assimilation.
How
these
two
functions
work
we
do
not
intend
to
demonstrate,
as
it
can
easily
be
found
in
any
treatise
on
Physiology;
only
this
we
may
be
permitted
to
say,
that
the
materials