Professor Preyer considers that the development of the power of using language is the most prominent index to the unfolding of the intellect. He differs with Professor Max Müller, however, on the question whether the operation of thinking can be carried on without the use of words.
Series Edited By William T. Harris, Volume IX.
ents of Eyelids.--Fifth week, irregular movements of lids. Eighth week, lid covering iris (23). Twenty-fifth day, opening and shutting eyes in surprise (30). Fifty-seventh and fifty-eighth days, winking. Sixtieth day, quick opening and shutting in fright (26).
Movements of Eyes.--Thirty-first day, strabismus rare. Forty-sixth to fiftieth day, very rare. Fifty-fifth day, irregular movements rare, but appearing in sleep till the sixtieth day (37).
Direction of Look.--Fifth week, toward the Christmas-tree (45). Thirty-ninth day, toward tassels swinging (46). Seventh week, moving lamp or bright object followed (45).
HEARING.--Fifth week, child does not sleep if persons walk or speak. Starting at noises. Sixth week, starting at slight noises even in sleep; quieted by mother's singing. Seventh week, fright at noise is greater (83). Sensibility to musical tones, ditto. Eighth week, tones of piano give pleasure (84).
TOUCH.--Thirty-eighth day, movements caused by tou
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