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61
Referred
to
the
embryo
s
troublesome
tendency
to
anæmia
,
to
the
massive
doses
of
hog
s
stomach
extract
and
foetal
foal
s
liver
with
which
,
in
consequence
,
it
had
to
be
supplied
.
62
Showed
them
the
simple
mechanism
by
means
of
which
,
during
the
last
two
metres
out
of
every
eight
,
all
the
embryos
were
simultaneously
shaken
into
familiarity
with
movement
.
Hinted
at
the
gravity
of
the
so
-
called
"
trauma
of
decanting
,
"
and
enumerated
the
precautions
taken
to
minimize
,
by
a
suitable
training
of
the
bottled
embryo
,
that
dangerous
shock
.
Told
them
of
the
test
for
sex
carried
out
in
the
neighborhood
of
Metre
200
.
Explained
the
system
of
labelling
a
T
for
the
males
,
a
circle
for
the
females
and
for
those
who
were
destined
to
become
freemartins
a
question
mark
,
black
on
a
white
ground
.
63
"
For
of
course
,
"
said
Mr
.
Foster
,
"
in
the
vast
majority
of
cases
,
fertility
is
merely
a
nuisance
.
One
fertile
ovary
in
twelve
hundred
that
would
really
be
quite
sufficient
for
our
purposes
.
But
we
want
to
have
a
good
choice
.
And
of
course
one
must
always
have
an
enormous
margin
of
safety
.
So
we
allow
as
many
as
thirty
per
cent
of
the
female
embryos
to
develop
normally
.
The
others
get
a
dose
of
male
sex
-
hormone
every
twenty
-
four
metres
for
the
rest
of
the
course
.
Result
:
they
re
decanted
as
freemartins
structurally
quite
normal
(
except
,
"
he
had
to
admit
,
"
that
they
do
have
the
slightest
tendency
to
grow
beards
)
,
but
sterile
.
Guaranteed
sterile
.
Отключить рекламу
64
Which
brings
us
at
last
,
"
continued
Mr
.
Foster
,
"
out
of
the
realm
of
mere
slavish
imitation
of
nature
into
the
much
more
interesting
world
of
human
invention
.
"
65
He
rubbed
his
hands
.
For
of
course
,
they
didn
t
content
themselves
with
merely
hatching
out
embryos
:
any
cow
could
do
that
.
66
"
We
also
predestine
and
condition
.
We
decant
our
babies
as
socialized
human
beings
,
as
Alphas
or
Epsilons
,
as
future
sewage
workers
or
future
.
.
.
"
He
was
going
to
say
"
future
World
controllers
,
"
but
correcting
himself
,
said
"
future
Directors
of
Hatcheries
,
"
instead
.
67
The
D
.
H
.
C
.
acknowledged
the
compliment
with
a
smile
.
Отключить рекламу
68
They
were
passing
Metre
320
on
Rack
11
.
A
young
Beta
-
Minus
mechanic
was
busy
with
screw
-
driver
and
spanner
on
the
blood
-
surrogate
pump
of
a
passing
bottle
.
The
hum
of
the
electric
motor
deepened
by
fractions
of
a
tone
as
he
turned
the
nuts
.
Down
,
down
.
.
.
A
final
twist
,
a
glance
at
the
revolution
counter
,
and
he
was
done
.
He
moved
two
paces
down
the
line
and
began
the
same
process
on
the
next
pump
.
69
"
Reducing
the
number
of
revolutions
per
minute
,
"
Mr
.
Foster
explained
.
"
The
surrogate
goes
round
slower
;
therefore
passes
through
the
lung
at
longer
intervals
;
therefore
gives
the
embryo
less
oxygen
.
Nothing
like
oxygen
-
shortage
for
keeping
an
embryo
below
par
.
"
Again
he
rubbed
his
hands
.
70
"
But
why
do
you
want
to
keep
the
embryo
below
par
?
"
asked
an
ingenuous
student
.