. Sigismund's
boy, long before he formed sentences, on seeing two horsemen, one
following the other at a short interval, said, _eite_ (for Reiter)!
_noch eins!_ This proves the activity of the faculty of numbering.

The boy F_{3}, at the age of two and two thirds years, still said
_schank_ for _Schrank_ and _nopf_ for _Knopf_, and, on being told to
say _Sch-r-ank_ plainly, he said _rrr-schank_. This child from the
thirty-first month on made much use of the interrogative words.
_Warum?_ _weshalb?_ he asked at every opportunity; very often, too,
_was?_ _wer?_ _wo?_ (Why? wherefore? what? who? where?); sometimes
_was?_ four or five times when he had been spoken to. When the
meaning of what had been said was made plain, then the child stopped
asking questions.

The little girl F_{4}, in her thirteenth month, always says, when she
sees a clock, _didda_ (for "tick-tack," which has been said to her), and
imitates with her finger the movement of the pendulum. It was noticed of
this child that, when not yet five months old, she would accompany a
song, sung for her by her mother, with a continuous, drawling
_aeh-aeh-aeh_; but, as soon as the mother stopped, the child became silent
also. The experiment was one day (the one hundred and forty-fifth of the
child's life) repeated nine times, with the same result.

I have myself repeatedly observed that babes in the fourth month respond
to words spoken in a forcible, pleasant manner with sounds indeterminate
often, with _oe-[)e]_ and other vowels. There is no imitation in this,
but a reaction that is possible only through participation of the
cerebrum, as in the case of the joyous sounds at music at an earlier
period.

The date at which the words heard from members of the family are for the
first time clearly imitated, and the time when the words of the
mother-tongue are first used independently, depends, undoubtedly, with
children in sound condition, chiefly upon the extent to which people
occupy themselves with the children. According to Heinr. Feldmann (_De
statu normali functionum corporis humani_. Inaugural dissertation,
Bonn, 1833, p. 3), thirty-three children spoke for the first time
(_prima verba fecerunt_) as follows:

14 15 16 17 18 19 Month.
1 8 19 3 1 1 Children.

Of these there could walk alone

8 9 10 11 12 Month.
--^-- ---^---
3 24 6 Children.

According to t