____________________
may
be
a
____________________
of
men
,
but
it
is
not
so
of
books
.
Knowledge
,
as
Johnson
said
,
is
of
two
____________________
,
you
may
know
a
thing
yourself
,
and
you
may
know
where
to
find
it
.
Now
the
amount
which
you
may
actually
know
yourself
must
,
at
its
best
,
be
limited
,
but
what
you
may
know
of
the
____________________
of
information
may
,
with
proper
training
,
become
almost
boundless
.
And
here
come
the
____________________
and
use
of
reference
books
-
-
the
working
of
one
book
in
____________________
with
another
?
and
applying
your
own
____________________
to
both
.
By
this
means
we
get
as
near
to
that
omniscient
volume
which
tells
everything
as
ever
we
shall
get
,
and
although
the
single
volume
or
work
which
tells
everything
does
not
exist
,
there
is
a
vast
number
of
reference
books
in
existence
,
a
knowledge
and
proper
use
of
____________________
is
essential
to
every
intelligent
person
.
Necessary
as
I
believe
reference
books
to
be
,
they
can
easily
be
made
to
be
____________________
to
idleness
,
and
too
mechanical
a
use
should
not
be
made
of
them
.
Very
admirable
reference
books
____________________
to
us
from
America
,
where
great
industry
____________________
shown
,
and
funds
for
publishing
them
never
seem
to
be
short
.
The
French
,
too
,
are
excellent
at
reference
books
,
but
the
inferior
way
in
which
they
are
printed
makes
them
____________________
to
refer
to
.
