face is said to be rounder and
fuller than the boy's; the expression of countenance in the former, to
be more bashful and modest. Stratz, however, urges in opposition to this
view, with justice, in my opinion, that we have here to do only with the
effects of individual educational influences, or perhaps with individual
variations, from which no general conclusions can safely be drawn.

During the second period of childhood sexual differences become much
more distinct. Before considering these differences, I must say a few
words regarding the growth of the child, since in this particular there
exists a notable distinction between the sexes. Careful measurements
have shown that during certain years of childhood growth occurs
especially in height, whereas in other years the main increase is in
girth. For this reason, it is customary to follow Bartels in his
subdivision of each of the two periods of childhood into two subperiods.
The age from one to four years is the _first period of growth in girth_;
from the beginning of the fifth to the completion of the seventh year is
the _first period of growth in height_; from the beginning of the eighth
to the completion of the tenth year is the _second period of growth in
girth_; and from the beginning of the eleventh to the completion of the
fourteenth year is the _second period of growth in height_. During these
periods there are certain differences in respect of growth between boys
and girls. Although in general the growth in height of the boy exceeds
that of the girl, there is a certain period during which the average
height of girls is greater than that of boys. From the beginning of the
eleventh year onwards, the girl grows in height so much more rapidly
than the boy, that from this age until the beginning of the fifteenth
year the average height of girls exceeds that of boys, although at all
other ages the reverse is the case. In our consideration of the
differences between the sexes, these differences in respect of growth
must not be overlooked.

In addition to these, other important differences between the sexes
manifest themselves during the second period of childhood. In the first
place, it is an established fact that in the girl the secondary sexual
characters make their appearance earlier than in the boy, the boy
remaining longer in the comparatively neutral condition of childhood. We
have seen that in the girl, at the end of the first period of childhood,
the lower