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- Путешествие на Луну
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- Стр. 32/99
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"
The
thing
is
very
simple
;
we
must
reduce
this
enormous
quantity
of
powder
,
while
preserving
to
it
its
mechanical
power
.
"
"
Good
;
but
by
what
means
?
"
"
I
am
going
to
tell
you
,
"
replied
Barbicane
quietly
.
"
Nothing
is
more
easy
than
to
reduce
this
mass
to
one
quarter
of
its
bulk
.
You
know
that
curious
cellular
matter
which
constitutes
the
elementary
tissues
of
vegetable
?
This
substance
is
found
quite
pure
in
many
bodies
,
especially
in
cotton
,
which
is
nothing
more
than
the
down
of
the
seeds
of
the
cotton
plant
.
Now
cotton
,
combined
with
cold
nitric
acid
,
become
transformed
into
a
substance
eminently
insoluble
,
combustible
,
and
explosive
.
It
was
first
discovered
in
1832
,
by
Braconnot
,
a
French
chemist
,
who
called
it
xyloidine
.
In
1838
another
Frenchman
,
Pelouze
,
investigated
its
different
properties
,
and
finally
,
in
1846
,
Schonbein
,
professor
of
chemistry
at
Bale
,
proposed
its
employment
for
purposes
of
war
.
This
powder
,
now
called
pyroxyle
,
or
fulminating
cotton
,
is
prepared
with
great
facility
by
simply
plunging
cotton
for
fifteen
minutes
in
nitric
acid
,
then
washing
it
in
water
,
then
drying
it
,
and
it
is
ready
for
use
.
"
"
Nothing
could
be
more
simple
,
"
said
Morgan
.
"
Moreover
,
pyroxyle
is
unaltered
by
moisture
--
a
valuable
property
to
us
,
inasmuch
as
it
would
take
several
days
to
charge
the
cannon
.
It
ignites
at
170
degrees
in
place
of
240
,
and
its
combustion
is
so
rapid
that
one
may
set
light
to
it
on
the
top
of
the
ordinary
powder
,
without
the
latter
having
time
to
ignite
.
"
"
Perfect
!
"
exclaimed
the
major
.
"
Only
it
is
more
expensive
.
"
"
What
matter
?
"
cried
J.
T.
Maston
.
