장음표시 사용
241쪽
air, produces an alteration in iis composition, and, in faci, renders it insolubie, so that a longer continuation of the pr cess diminishes rather than increares the strength of the solution. As the solvent poWer of the water is increased by heat, so in most instances does this saturaled hol solution de posit some part Os iis contenis and come turbid as it c is
iis separation Dom the insolubie paris, is, theres ore, to bomade by straining Whilst it is stili hol, and is best done, generalty spealaing, by squeeZing tbe solution through a coisscilinen cloth; but in many instances inere the decoction is Ioaded with mucilage, and the separation of gross particles is
ali that is necessary, a common strainor is sussicient. In thointimate connection Whicti exists bet en the severat parmos vegetabies, it osten happens that the solution os one is
attended by a suspension in a minutely divided state os amother, Whicli is, in faci, itsulf insolubie in the solvent e ployed; and this principie is also applied in the preparatiorios some decoctions. The aqueous solutions of vegetablematters are apt to decompose id they be long kepi; hinc they should not generalty be made in large quantities avnce, but rather be considerod as objects of extemporaneous preparation, introduced into the Pharmacopoeia fur the pur- pose of convenience, and of avoiding, in articles of generaluse, the constant repetition os those directions Which wouldoiber ise be necessary in every prescription
242쪽
Extraci of spiked Aloe poWdered, Myrrh poWdered, Saffron stigmata, of each a
This decoction, nom sirst introduced, is analogous to an sicle in very frequent use, under thoe name of Beatime de
243쪽
Decoctum cinctionete, P. L. 1787.
Vater, a Pint. Boit for ton minutes in a vesset stightly covered, and strain the decoction While hol.
According to the option os the Practitioner, the barti ofelther of the other species of cinctiona, the cordi lia, oraelis or the oblongi lia, or res: maybe substituted forthe lancifolia, or quilled: Whicli is here directed. In theformer directions, three more ounces of water Were added, in order to provide for the loss by evaporation, and to yieldone clear pint of decoction ; but this provision has been deemed unnecessary. The use of bruised, or coarsely divided, instead of the poWdered, or finely divided, bark, is practicallyadVantageous, ora account of iis tess price and the greater certainty of iis quality, and it is at the fame time fully sufficient for the pu Ose.
244쪽
Mucilago seminis cydonii mali, P. L. I 87. Mucilago semianum cydonionum, P. L. 1765.
Τako os Quince Seeds, tWo drachm8. Water, a Pint. Boii over a gentie sire for teri minuteg, then
ΤhIs decoction has been removed Dom among the muci lages, as being less dense than either of the others, and asbeing employed in larger doses like other mucilaginous decoctions. In addition to gum, it contains other constituent paris of the Seeds, and is, theresere, more apt to spoli than common mucilage, OVer Whicli it possesses no other alva lages, than that it is more gratent, and is suffciently thin, without farther dilution, to forni the bulla of any liquid medicine.
245쪽
Decoctum hordei, P. L. II87. Aqua hordeata, P. L. 1765.
246쪽
The directions for this and the follosing compound D coction may seem rather to belong to the nurse than theapothecary. Iis preparation, hoWever, is matter of no smallimportance, as those well know who are in the habit of see-ing it in the chambers of the sich; and it is somelimes usedalso as a vehicle sor other active medicinal substances.
Decoctum hordei compositum, Ρ. L. D8I. Decoctum pectorale, P. L. 174 5. Ρ. L. 1I20.
The utility or necessity of stoning the ratians has beendo ted, but at any tae it assisis the exposure of the interior part of the fruit, Which Would otherwise be defended by the inin Dom the action of the water.
247쪽
Vater, a Pint anil halfBoii do vn to a pint, and Strain.
Decoctum pro rarentate, P. L. I 87. Decoctum commune pro clystere, P. L. 1745. Ρ. L. 172O.
Water, a Pint. Boit for a quarter of an hour, aud Strain.
The impregnation of Water With various herbs for the p pose of clysters and fomentations has very generalty Pre- , valled; and two formulae applicabie to these purposes Were directed in the last Pharmacopoeia ; this is substituted sorine Decoctum pro enemate, and may ans er esther Pur
248쪽
Decoctum pro fomento, 'Ρ. L. 178I. Fotus communis, P. L. I 45.
For various Purposes, especialty fomentations, advantago is derived Dom the solution of the narcotic mattor containedin poppy heads; this may theresere be considered as a usefuladdition, and as reducing to form a direction in very common
249쪽
This astringent decoction is chiefly used for externat applicationS.
Decoctum sars arillae, P. L. 1787.
The directions for this and the folio ing formula are πι- ried Dom those of the sormer Pharmacopoeia, by omittingthe precise temperature of I95 whicli vias there defined, and substituting the more practical and convenient digestionupon the fide of a fre in an ordinary StOVe.
250쪽
DECOCTUM SARSA PARILLAE COMPOSITUM.