at, aet; dae, ba, ta, tae; nd.
11. ad, al, ak, er, ej, oed; da, gae, bae, ka, ke, je,
he, ne; pr, tr.
12. w, aen, op, ew, aer; de, wae; nj, ld.
13. s (ss), en; hi; dn.
14. mu; kn, gn, kt.
15. z, ooe, oea, is, iss, es, ass, th (English),
ith (Engl.), it; hae, di, wa, sse.
16. f (v), ok, on; do, go; bw, fp.
17. ib, oet, an; bi.
18. aei, iae; aep, im; tu, pae; ft.
19. oen, et, es; sa, be; st, tth (Engl.), s-ch, sj.
20. ub, ot, id, od, oj, uf, aet; bo, ro, jo; dj,
dth (Engl.).
21. oep; fe; rl, dl, nk, pt.
22. ol; lo; ps, pt, tl, sch, tsch, pth (Engl.).
23. q, uo; id, op, um, em, us, un, ow, ed, uk, ig, il;
joe, ju, po, mo, wo, fa, fo, fi, we, ku (qu),
li, ti; tn, pf, gch, gj, tj, schg.
24. ut, esch; pu, wi, schi, pi.
25. oe, ul, il, och, iw, ip, ur; lt, rb, rt.
26. nl, ds, mp, rm, fl, kl, nch, ml, dr.
27. x, kch, cht, lch, ls, sw, sl.
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* Pronounce the letters in the tabular view as in German.

Every such chronological view of the sequence of sounds is uncertain,
because we can not observe the child uninterruptedly, and hence the
first appearance of a new sound easily escapes notice. The above
synopsis has a chronological value only so far as this, that it
announces, concerning every single sound, that such sound was heard in
its purity by me at least as early as the given month. The sound may,
however, have been uttered considerably earlier without my hearing it. I
know from personal experience that in other children many sounds appear
much earlier; in my child, e. g., _ngae_ was observed too late, and I
have no doubt that the first utterance of _f_ and _w_ was unobserved,
although I was on the lookout for them. When it is maintained, on the
contrary, that _m_ is not heard from a normal child until the tenth
month, then the _am_ and _moe_ which appear universally in the first
half-year have escaped notice. Earlier tabular views of this sort, which
have even served as a foundation for instruction of deaf-mutes in
speaking, d