f the pupil. At any given age of
school life bright or advanced pupils tend toward accentuated
unidexterity, and dull or backward pupils tend toward
ambidexterity.... Training in ambidexterity is training contrary
to a law of child life.

4. Boys of school age at the Bridewell (reform school) are
inferior in all physical measurements to boys in the ordinary
schools, and this inferiority seems to increase with age.

5. Defects of sight and hearing are more numerous among the dull
and backward pupils. These defects should be taken into
consideration in the seating of pupils. Only by removing the
defects can the best advancement be secured.

6. The number of eye and ear defects increases during the first
years of school life. The causes of this increase should be
investigated, and, as far as possible, removed.

7. There are certain parts of the school day when pupils, on the
average, have a higher storage of energy than at other periods.
These periods should be utilized for the highest forms of
educational work.

8. The stature of boys is greater than that of girls up to the age
of eleven, when the girls surpass the boys and remain greater in
stature up to the age of fourteen. After fourteen, girls increase
in stature very slowly and very slightly, while boys continue to
increase rapidly until eighteen.

9. The weight of the girl surpasses that of the boy about a year
later than her stature surpasses his, and she maintains her
superiority in weight to a later period of time than she maintains
her superiority in height.

10. In height, sitting, girls surpass boys at the same age as in
stature, namely, eleven years, but they maintain their superiority
in this measurement for one year longer than they do in stature,
which indicates that the more rapid growth of the boy at this age
is in the lower extremities rather than in the trunk.

11. Commencing at the age of thirteen, strength of grip in boys
shows a marked accentuation in its rate of increase, and this
increase continues as far as our observations extend, namely, to
the age of twenty. In girls no such great acceleration in muscular
strength at puberty occurs, and after sixteen there is little
increase in strength of grip. The well-known muscular
differentiation of the sexes practically begins at thirteen.

12. As with strength of grip, so with endurance as measured by the
ergo