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180 ESOTERIC ANTHROPOLOGY.
nous beginnings of the bones of the spinal column, the
heart, brain, etc.
Fig. 59. Fig. 59 gives a magnified view
of the germinal spot, or streak,
in Fig. 58. c. Tho dark squares
are rudiments of the vertebral
column, d. Is the anterior cere
bral cell. / Dorsal cord. All
this, nature has accomplished in
twenty-four hours.
On the thirteenth day
the embryo is as large as
a horse-fly, and resem
bles a worm bent together.
There are as yet no limbs,
and the head is larger than
the rest of the body.
When stretched out, the
embryo is nearly half an
inch long.
In the seventh week
bone begins to form in the
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MAGNIFIED EJI15EYO CHICKEN. i
.
,„,„
.
, ,
lower jaw and clavicle.
Narrow streaks on each side of the vertebral column
show the beginning of ribs ; the heart is perfecting its
form ; the brain enlarged, and the eye and ear grow
ing more perfect, and the limbs sprouting from tho
body. The lungs are mere sacs, about one line in
length, and the trachea is a delicate thread, but the
liver is very large. The arms are still imperforate. In
the seventh week are formed the renal capsules and kid
neys, and the sexual organs are speedily evolved, but
the sex of the foetus is not determined until some time