-
Главная
-
- Книги
-
- Авторы
-
- Исаак Азимов
-
- Конец вечности
-
- Стр. 170/248
Для того чтобы воспользоваться озвучкой предложений, необходимо
Войти или зарегистрироваться
Озвучка предложений доступна при наличии PRO-доступа
Купить PRO-доступ
"
Check
on
that
very
carefully
,
of
course
.
But
it
will
be
right
.
It
will
be
right
.
"
(
Harlan
thought
:
It
will
be
right
because
it
was
right
.
Round
…
)
Cooper
must
have
looked
unconvinced
,
though
,
for
Twissell
said
,
"
The
accuracy
of
focus
was
carefully
worked
out
.
I
intended
to
explain
our
methods
and
now
is
a
good
time
.
For
one
thing
,
it
will
help
Harlan
understand
the
controls
.
"
(
Suddenly
Harlan
turned
away
from
the
windows
and
fixed
his
gaze
on
the
controls
.
A
corner
of
the
curtain
of
despair
lifted
.
What
if
-
-
)
Twissell
still
lectured
Cooper
with
the
anxious
overprecise
tone
of
the
schoolteacher
,
and
with
part
of
his
mind
Harlan
still
listened
.
Twissell
said
,
"
Obviously
a
serious
problem
was
that
of
determining
how
far
into
the
Primitive
an
object
is
sent
after
the
application
of
a
given
energy
thrust
.
The
most
direct
method
would
have
been
to
send
a
man
into
the
downwhen
via
this
kettle
using
carefully
graduated
thrust
levels
.
To
do
that
,
however
,
would
have
meant
a
certain
lapse
of
time
in
each
case
while
the
man
determined
the
Century
to
its
nearest
hundredth
through
astronomical
observation
or
by
obtaining
appropriate
information
over
the
wireless
.
That
would
be
slow
and
also
dangerous
since
the
man
might
well
be
discovered
by
the
native
inhabitants
with
probably
catastrophic
effects
on
our
project
.
"
What
we
did
then
instead
was
this
:
We
sent
back
a
known
mass
of
the
radioactive
isotope
,
niobium
-
94
,
which
decays
by
beta
-
particle
emission
to
the
stable
isotope
,
molybdenum
-
94
.
The
process
has
a
halflife
of
almost
exactly
500
Centuries
.
The
original
radiation
intensity
of
the
mass
was
known
.
That
intensity
decreases
with
time
according
to
the
simple
relationship
involved
in
first
-
order
kinetics
,
and
,
of
course
,
the
intensity
can
be
measured
with
great
precision
.
"
When
the
kettle
reaches
its
destination
in
Primitive
times
,
the
ampule
containing
the
isotope
is
discharged
into
the
mountainside
and
the
kettle
then
returns
to
Eternity
.
At
the
moment
in
physiotime
that
the
ampule
is
discharged
,
it
simultaneously
appears
at
all
future
Times
growing
progressively
older
.
At
the
place
of
discharge
in
the
575th
(
in
actual
Time
and
not
in
Eternity
)
a
Technician
detects
the
ampule
by
its
radiation
and
retrieves
it
.
"
The
radiation
intensity
is
measured
,
the
time
it
has
remained
in
the
mountainside
is
then
known
,
the
Century
to
which
the
kettle
traveled
is
also
known
to
two
decimal
places
.
Dozens
of
ampules
were
thus
sent
back
at
various
thrust
levels
and
a
calibration
curve
set
up
.
The
curve
was
a
check
against
ampules
sent
not
all
the
way
into
the
Primitive
but
into
the
early
Centuries
of
Eternity
where
direct
observations
could
also
be
made
.
