Excerpt from The Pedagogical Seminary, Vol. 16: A Quarterly International Record of Educational Literature Institutions and Progress

The vocabularies of children have such obvious psychological and pedagogical interest that we deem it scarcely necessary to apologize for adding another to the already numerous lists that have been published, particularly since we ourselves have been greatly aided in our observation of the linguistic development of our own child by the inspection of the vocabularies of other children of his age, and since the majority of the published lists have been obtained from children of but two years of age, so that we have relatively little information concerning the growth of the child's vocabulary during his third year.

Biographical

The child Richard, whose vocabulary up to three years of age is here presented, has been the only child in the family since his birth. He is in every way a normal child, but perhaps somewhat farther advanced in general physical and mental development than the average child of his age.

As it is of interest to examine the relation between linguistic and general physical and mental development, we note here certain data with reference to the time of appearance of the most significant developmental 'landmarks, ' physical growth, dentition, the acquisition of locomotion, beginnings of speech, etc.

Weight at birth, 9.3 lbs., at 6 months, 16.7 lbs., at 12 months, 23.2 lbs., at 2 years, 30.5 lbs., at 3.6 years (date of writing) 38.8 lbs. Height at 3.6 years, 39 inches.

First two teeth, 4.5 months, 8 teeth, 7.7 months, 16 teeth, 13 months, 20 teeth, 21 months.

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