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"
To
make
candles
?
"
"
Yes
.
"
Such
was
the
engineer
's
project
;
and
it
was
quite
feasible
,
since
he
had
lime
and
sulphuric
acid
,
while
the
amphibians
of
the
islet
would
furnish
the
fat
necessary
for
the
manufacture
.
They
were
now
at
the
4th
of
June
.
It
was
Whit
Sunday
and
they
agreed
to
observe
this
feast
.
All
work
was
suspended
,
and
prayers
were
offered
to
Heaven
.
But
these
prayers
were
now
thanksgivings
.
The
settlers
in
Lincoln
Island
were
no
longer
the
miserable
castaways
thrown
on
the
islet
.
They
asked
for
nothing
more
--
they
gave
thanks
.
The
next
day
,
the
5th
of
June
,
in
rather
uncertain
weather
,
they
set
out
for
the
islet
.
They
had
to
profit
by
the
low
tide
to
cross
the
Channel
,
and
it
was
agreed
that
they
would
construct
,
for
this
purpose
,
as
well
as
they
could
,
a
boat
which
would
render
communication
so
much
easier
,
and
would
also
permit
them
to
ascend
the
Mercy
,
at
the
time
of
their
grand
exploration
of
the
southwest
of
the
island
,
which
was
put
off
till
the
first
fine
days
.
The
seals
were
numerous
,
and
the
hunters
,
armed
with
their
iron-tipped
spears
,
easily
killed
half-a-dozen
.
Neb
and
Pencroft
skinned
them
,
and
only
brought
back
to
Granite
House
their
fat
and
skin
,
this
skin
being
intended
for
the
manufacture
of
boots
.
The
result
of
the
hunt
was
this
:
nearly
three
hundred
pounds
of
fat
,
all
to
be
employed
in
the
fabrication
of
candles
.
The
operation
was
extremely
simple
,
and
if
it
did
not
yield
absolutely
perfect
results
,
they
were
at
least
very
useful
.
Cyrus
Harding
would
only
have
had
at
his
disposal
sulphuric
acid
,
but
by
heating
this
acid
with
the
neutral
fatty
bodies
he
could
separate
the
glycerine
;
then
from
this
new
combination
,
he
easily
separated
the
olein
,
the
margarin
,
and
the
stearin
,
by
employing
boiling
water
.
But
to
simplify
the
operation
,
he
preferred
to
saponify
the
fat
by
means
of
lime
.
By
this
he
obtained
a
calcareous
soap
,
easy
to
decompose
by
sulphuric
acid
,
which
precipitated
the
lime
into
the
state
of
sulphate
,
and
liberated
the
fatty
acids
.
From
these
three
acids-oleic
,
margaric
,
and
stearic-the
first
,
being
liquid
,
was
driven
out
by
a
sufficient
pressure
.
As
to
the
two
others
,
they
formed
the
very
substance
of
which
the
candles
were
to
be
molded
.
This
operation
did
not
last
more
than
four
and
twenty
hours
.
The
wicks
,
after
several
trials
,
were
made
of
vegetable
fibers
,
and
dipped
in
the
liquefied
substance
,
they
formed
regular
stearic
candles
,
molded
by
the
hand
,
which
only
wanted
whiteness
and
polish
.
