erstood_ at least 1,000 words more than those
enumerated here, i. e., than those published by him, and that with both
children facility of pronunciation had more influence in regard to the
use of words than did the ease with which the words could be understood;
this, however, does not plainly follow from the printed statements
before me, as he admits. When the first-born child was captivated by a
new word, she was accustomed to practice it by herself, alone, and then
to come and employ it with a certain pride. The second child did so,
too, only in a less striking manner. The boy, on the contrary, who was
four years old in December, 1881, and who had no ear for music and less
pride than his sisters, did not do as they did.

Further, the statements of the number of all the nouns, adjectives,
verbs, and adverbs used by a child of two years are of interest,
although they present several errors: e. g., _supper_ makes its
appearance twice in the case of the same child under _s_, and _enough_
figures as an adjective. For the three girls, in their twenty-fourth
month, the results were:

-----------------------|----------------|-----------------|-------------
Parts of Speech. | First child. | Second child. | Third child.
-----------------------|----------------|-----------------|-------------
Nouns | 285 | 230 | 113
Verbs | 107 | 90 | 30
Adjectives | 34 | 37 | 13
Adverbs | 29 | 17 | 6
Other parts of speech | 28 | 25 | 11
|----------------|-----------------|-------------
Total | 483 | 399 | 173
------------------------------------------------------------------------

A fourth child, brother of the first and second, made use (according to
the lists kindly communicated to me by the author), in his twenty-fourth
month, of 227 nouns--some proper names among them--105 verbs, 22
adjectives, 10 adverbs, and 33 words of the remaining classes (all these
figures being taken from the notes of the child's mother).

From these four vocabularies of the twenty-fourth month it plainly
results that the stock of words and the kinds of words depend primarily
on the words most used in the neighborhood of the child, and the objects
most frequently perceived; they can not,