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, therefore, be alike in different children. The daughters of the astronomer, before their third year, name correctly a portrait of Galileo, and one of Struve. A local "tone," or peculiarity of this sort, attaches to every individual child, a general one to the children of a race. I may add that the third child (in England) seems to have been less accurately observed than the others (in Madison, Wisconsin). Great patience and attention are required to observe and note down every word used by a child in a month.