[81]. With the diphthong or glide ī may be taken oi, which was first mastered by the child M. at the age of two years three months.
[82]. I find according to the notes sent me that the sounds s and sh develop unequally in the cases of different children. Some acquire s, others sh before the other.
[83]. See Sweet, History of English Sounds, p. 15.
[84]. See Sievers, Phonetik, p. 230.
[85]. Cf. Pollock, Mind, vi., p. 436, and Preyer, op. cit., p. 434.
[86]. The same child, capriciously as it might look, would sometimes avoid y, as in saying ‘esh’ for ‘yes,’ though she regularly used this sound as a substitute for l, saying ‘yook’ for ‘look,’ and so on.
[87]. See Sweet, History of English Sounds, p. 33; cf. also the change of ‘frith’ to ‘firth’.
[88]. Op. cit., p. 397.
[89]. See Tylor, Primitive Culture, i., 198. On the taking up of baby reduplications into language see the same work, i., 204. Cf. the same writer’s Anthropology, p. 129.
[90]. See above, p. 137; cf. Sievers, Phonetik, p. 236.