The Sauk Centre herald. (Sauk Centre, Stearns County, Minn.) 1886-current, 1926-03-18

the location of the germ spot in the
yolk is the lightest part of the yolk
and always turns to the top regardless
of the position of the egg.
"Second-that the head part of the
embryo always turns to the highest
part of the egg.
"Third-that the provision for an
air sell is made in the large end of
of the egg by the two shell mem
branes not being fastened together in
that point.
"Fourth-that the shell is so con-
structed that it permits, under favor
able conditions an air cell to form
which is correct in size for the
chicks use in getting out of the egg.
Another interesting law is that
all chicks must be in the same posi-
ton in the egg in order for them to
get out of the shells. The yolk be-
ing lighter than the white causes the
yolk to gradually rise and it would in
time reach the shell. By turning the
egg over the yolk has more time be-
fore it reaches the shell membrane
The embryo is supplied with nourish-
ment through vessels lying between
the yolk and the white. The en-
bryo does its breathing through
blood vessels lying on the outside OF
, the white and the shell membranes
When the egg is turned over, the
relation of these blood vessels to the
egg content is changed thus making
it practically new feeding ground
When the egg is turned over the en-
bryo appears to exert itself in order
to reach its position on top of the
yolk so its head will be towards the
highest part of the egg, thus giving
the extra size while in the egg. The
embryo reaches a settled position or
top of the egg more quickly at the
beginning of the incubation than al
the close, but the average time il
takes an embryo to become settled or
top of the yolk after turning the
egg eErears to be about eight hours
! This would indicate that the ege
should not be turned more often thar
8 hours and as I doubt if the germ
should remain in one position Longer
than hours, I feel that turning thu
eggs should be done in from to Il
hour periods.
"There are three ways in which
eggs may be turned.
"First rolled in side movements
second, in an end over end, fip-fo,
method and the other is raising O.
lowering the ends of the egg. Tn,
first two methods are the same so ia
as the movement of the embryo in
side the egg is concerned, for in eacl
case the embryo twists or turn
around in the egg on the yolk bu
keeps its head to the large end O
the air cell.
In the third case, where the small
end of the egg is made the highest
the embryo turns around with it
head toward the small or highest par
OF the egg and then if the small en-,
is lowered, the embryo turns aroun,
again with its head to thL highest par
at that time The embryo, however
does not turn quickly so the eg,
would have to remain in each position
for hours before complete change i
made.
"The embryo could continue t,
turn from end to end until from 1:
to Is days incubation at which tim,
it reaches length which is as grea
or greater than the diameter of tn,
egg, after which it cannot turn, S,
its head remains in that position tn
rest of the time.
GAS the position of the chick i
naturally fixed in a long slender egg
much sooner than in round egg, n,
certain day can be fixed as the dat,
when the position is thus set although
there is one certain day in which tn,
position of each chick is fixed bu
the shape of the egg make the diff
ference in dates.
"After an egg rests with the small
end up during the day the positio
of chick is fixed in the egg, the chicl
cannot turn back so it pips in tn,
small end of the egg and whel
chicks pip in the small end of tn,
egg, only about 10 per cent of the n
hatch.
"Now I am afraid my letter will
be too long, therefore will continue
this next week"