Milford chronicle., 1911-05-05

hens are doing better incubating thar
the machine. Appearances, as noted,
indicate that the fertile eggs under
the hens should successfully hatch
into strong chicks.
The artificial method, however,
according to the indications men
toned, has provided too high tenn
perature at some time or times, too
much air excessive ventilation or
too little moisture in the atmosphere
of tine egg-chamber during the early
days of incubation. The heart ac-
tiOn and blood circulation are too
emphatic and there may be some
reaction.
If, furthermore, the bordering vein
Of the blastOderm shows through the
shell of the egg, it is additional and
emphatic testimony to the injurious
effects OF one or more of the unfav-
orable conditions just mentioned.
If the bordering vein appears as
bright a red circle (bloOd ring) there
has been a hemorrhage and death in
the shell. The expired embryo may
then appear as a dark spot close
against the inner shell OF floating in
the white of the egg. Ifthe contents
of the egg have a cloudy appearance
and no life movement the germ has
started and died. Any eggs that fail
to show motion or life within should
be opened and examined to deter
mine what has taken place.
If the air.cell is much enlarged
there has been too great evaporation
of the liquid contents of the egg and
the amnion probably lacks some
what of the limpid albumen, which
should surround and protect the en-
bryo.
Eggs, which appear clear, like
fresh eggs, before the tester, are in
fertile and will not develop embryos.
At the close of the sixth day of
incubating, the large ends of the eggs
are carefully Looked at before the
tester to see if the blood vessels of
the blastoderm have succeeded in
passing across under the air-cell. III
the air cell has increased much in
size, this passage may be hindered.
The distance across is increased and
the direct evaporation tends to leave
the albumeu between the yolk and
the air-cell thicker than it should be !
Further the net work of veins is IL
able to halt in its advance under the
and correspondingly on the
side of the yolk at the
small end of the egg The embryo,
at this stage, should appear very ac-
tive in its movements. diving about
within its waterv sac, now disap-
pearing from sight for a moment,
deep down in the amnion, then re-
plunging this way and
that and seemingly well satisfied
with the conditions of life within an
egg-shell.
At this stage of incubation, even
dark shelied eggs may be satisfac-
.orily examined before a good egg
tester.
If the eggs from the incubator
appear to be less forward in devel-
Dpment than those from under the
sitting hens, it will be well to open
several of each lot and examine
closely The fine network of veins
should have nearly enclosed the yolk.
If there has been a halting and a
gat the edges, part of the yolk's
surface will be left uncovered by
Dlood-vessels with a consequent fail
Ire to utilize some of the sources of
punishment foI the growth of the
embryo.
Eight days should have given am
1le time for the complete surround
ng of the yolk by the network of :
,eins. An egg should be opened to ,
ZEE how this enclosing of the yolk ;
appears at close range.
Another series of blood vessels ap-
veins of the allantois /;
vhich starts out of the abdomen of :
he embryo about the third day of :
Incubation and gradually spreads, :
With its network of large and small :
ems, until it encloses the white and .
he yolk together and ramifies over
he inner membrane of the soft shell
f the egg.
By the end of the ninth day the
arge blood-vessels of the allantois
how conspicuously, floating in the
lbumen. near the inner shell, in -
he area Just below the air-cell, where n
he movements of the embryo are
lsO evident.
After ten days the "allantois'
eining has become very apparent in is
ne somewhat clear region next to 81
ne air-cell. The "allantois" system z
veins helps to darken the shadow h
efore the egg-tester, contrasting q