imperceptible
is
indistinct
ateach
extreme.
Nevertheless
we may say
that in
the case
of this
organism,as
of
organisms
in
general,
the
account,
partially
based on
observation
butlargely
based on
inference,
fulfils
the
definition
of a
complete
historyfairly
well. But
it is
otherwise
throughout
the
inorganic
world.
Inferencehere
plays the
chief
part. Only
by the
piecing
together
of
scattered
factscan
we form
any
conception
of the
