ses- Foreign Literature and Science. 
the reduction of metals, when the object is to obtain thess 
pure, and not in the condition of. sulphurets.—JLbid. 
4. NoTe on the oropeniition and ase of alkaline digestive 
pastils, containing’ bi-carbonate of soda ; ‘by M. D’ Arcet.— 
Haying been ‘obliged, three years ago, to ma ake an almost 
daily use of pastils of magnesia, [ was afraid that the AR Das 
cmpenments of this substanee would contribute to faver the fo 
rinary calculus, and I thought of substituting ear- 
Ce. of aa. In. 1822, [made a series of experiments, whiels 
gave me such good results that £ decided, from that time, on 
ing no more magnesia for the correction of an impaired 
digestion, and from the month of September, in that year, F 
employed only pure carbonate of soda. These pastils in- 
stantly destroyed the acidity eccasioned by bad digestion, and 
favored perfectly the functions of the stomach ; but they had 
the inconyenience of being too strongly allealinie, and having 
a disagreeable taste. . I nevertheless made use of them, with 
much ee until the middle of June, 1824, when [ re- 
paired, for the first. time, to the waters of Vichy. PT knew 
that these Steen waters were digestive, and I soon found 
that a glass, taken after a meal, was sufficient to promote di- , 
gestion, and even to. restore it when disturbed. Having ve- 
rified the goodness of this remedy, during my first visit at 
Vichy, aud ace that the bicarbonate of soda is the act- 
of substituting the former for the latter, in the pastils [ made 
use of. I gave the receipt for these pastils to M. Regnaald, 
who began to offer them to the public in the menth of Janu- 
ary, 1825. The use of them having rapidly spread, and 
obtaining from them myself the best ‘effects, I took the re- 
ecipt to Vichy, in the monthef June last. M. Batillar, apo- 
athecary of the thermal establishment, manufactured) large 
-quantities ef them, and he now prepare s, daily, five ‘ilo 
grammes, or 5000 pastils. The receipt bet been eommuni~ 
cated to those who have asked far it, and the alkaline digest- 
ive pastils, prepared with bicarbonate of soda, are found in 
shops of the first, apothecaries of Paris, Lyons, Ke. 
si "The following is the receipt, as I have given its 1 invite 
apothecaries, who oo avail themselves of Lea to. oie it 
eee thnk 0 rope eaeeage td 
