Though ammonium chloride has certain irritant properties which may disorder the stomach, yet if its mucous membrane be depressed and atonic the drug may improve its condition, and it has been used with success in gastric and intestinal catarrhs of a subacute type and is given in doses of io grains half an hour before meals in painful dyspepsia due to hyperacidity.
In some cases a post-tonic vowel other than a is preserved in Catalan, as, for example, when that vowel forms a diphthong with the tonic (Deft, D e us; Ebriu, He bred s); or, again, it sometimes happens, when the tonic is followed by an i in hiatus, that the i persists (diliivi, dilfivium; servici, servicium; lbi, lbium; ciri, cereus); but in many cases these ought to be regarded as learned forms, as is shown by the existence of parallel ones, such as servey, where the atonic i has been attracted by the tonic and forms a diphthong with it (servIci, scrvii, serve)?).
I atonic is often represented by e even when it is long (vehi, v i c i n u s).
0 atonic close, which in genuine Catalan exists only before the tonic, has become U; at the present day truvar, cuntradii is the real pronunciation of the words spelt trovar, contradir, and in the final syllables, verbal or other, where under Castilian influence an o has come to be added to the normal Catalan form, this a has the value of a a: trovo (genuine Catalan, irop) is pronounced trovu; bravo (genuine Catalan, brau) is pronounced bravu.
U atonic keeps its ground.
Navarrese-Aragonese.----Ir~ its treatment ef the post-tonic vowel-i this dialect parts company with normal Castilian and comes neares Catalan, in so far as it drops the final e, especially after nt ci (inon4 plazient, snueri, fuerl, parenis, genis); and, when the atonic e has dropped after a 1, this v becomes a vowelbreu (b rev e ni), grieu (*g rave rn) nueu (no v e m).
These nasal vowels enter into combination with a final atonic vowel: irrno (g e r m anu s); also amo (a man t), sermo (sermon em), where the o is a degenerated representative of the Latin final vowel.
With regard to the atonic vowels, there is a tendency to reduce a into a vowel resembling the Fr.