I. E. Loebisch, likewise a physician, in his "Entwickelungsgeschichte der Seele des Kindes" ("History of the Development of the Mind of the Child," Vienna, 1851, p. 68), says: "Naturally the first sound formed in the mouth, which is more or less open, while the other organs of speech are inactive, is the sound resembling _a_, which approximates sometimes more, sometimes less, nearly to the _e_ and the _o_.[D] "Of the consonants the first are those formed by closing and opening the lips: _m_, _b_, _p_; these are at first indistinct and not decidedly differentiated till later; then the _m_ naturally goes not only before the _a_ but also after it; _b_ and _p_ for a long time merely commence a syllable, and rarely close one until other consonants also have been formed. A child soon says _pa_, but certainly does not say _ab_ until he can already pronounce other consonants also (p. 79). "The order in which the sounds are produced by the child is the following: Of the vowels, first _a_, _e_, _o_, _u_, of course not well distinguished from _a_ at the beginning; the last vowel is _i_. Of the consonants, _m_ is the first, and it passes by way of the _w_ into _b_ and _p_. But here we may express our astonishment that so many writers on the subject of the order of succession of the consonants in the development of speech have assigned so late a date to the formation of the _w_; Schwarz puts it even after _t_, and before _r_ and _s_. Then come _d_, _t_; then _l_ and _n_; _n_ is easily combined with _d_ when it precedes _d_; next _f_ and the gutturals _h_, _ch_, _g_, _k_, the _g_ and _k_ often confounded with _d_ and _t_. _S_ and _r_ are regarded as nearly simultaneous in their appearance; the gutturals as coming later, the latest of them being _ch_. Still, there is a difference in this respect in different children. For many produce a sound resembling _r_ among the first consonant sounds; so too _ae_, _oe_, _ue_; the diphthongs proper do not come till the last." These statements of Loebisch, going, as they do, far beyond pure observation, can not all be regarded as having general validity. For most German children, at least, even those first adduced can scarcely claim to be well founded.