SULP

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cases as sulphate of quinine, but is not in so much repute, thoughperhaps little different in power.

Sulphas Morphine. Sulphate of Morphia. Dissolve six parts mor-phine in 12 parts distilled water, add sulphuric acid diluted withtwice its bulk of water till the morphine is saturated ; evaporatecrystallize. Dose gr. j to gr. iij.

Sulphas Potass^b cum Sulphure. E. Sulphate of Potass with Sul-phur. Take equal weights of nitrate of potass in powder and sub-limed sulphur ; dephlagrate by degrees in a red-hot crucible, andput when cold in a well-stopped glass vessel.Decomposition. The nitrate of potass is decomposed by the heat, andoxygen being evolved forms sulphuric acid, which unites with thepotass of the nitrate now set free. It contains a portion ofsulphur.Medicinally it has similar properties to the sulphate of potass, in dosesof gr. v to gr. x in psora, and externally in form of lotion.

Sulphas Quinine. D. Sulphate of Quinia, or Quinine. A combina-tion of quinine and sulphuric acid. Take tbiv of bark of the cin-chona cordifolia in coarse powder, flbviij of distilled water by measure,Jij of dilute sulphuric acid. Mix at a high temperature, agitatingfrequently; digest for four hours, then strain. Mix the residuumof the bark with an equal quantity of water, and strain. This is tobe thrice repeated. Add to the mixed solutions q. s. fresh-burnt lime,to saturate the acid, separate the precipitate with bibulous paper, addthree pints of rectified spirit; digest, agitating frequently for six hours,and strain; then digest the residuary powder with an equal quantityof rectified spirit, and strain. This is to be thrice repeated. Mix thesolutions and evaporate to dryness in a water-bath ; add gradually asmuch sulphuric acid as will make it sensibly sour, evaporate andcrystallize.Or, with M. Henri, the younger, digest Ibij of powdered bark, repeatedly,in Oxvj of hot water acidulated with gij of sulphuric acid, or it maybe boiled for half an hour each time. Strain the decoction through alinen cloth, and mix them, adding by small portions ftss of powderedquicklime, which will precipitate a brown flocculent substance. Se-parate this by means of a linen filter, and wash it with cold distilledwater, and dry. Digest this in rectified spirit with a moderate heatfor some hours, decant, and add fresh spirit so long as it is renderedbitter. Mix these tinctures, and distil in a water bath three-fourthsof the spirit. A brown viscid matter, which becomes brittle whencold, remains in the retort. Digest this in hot water acidulated withsulphuric acid, and the liquor when cold will give perfect crystals ofpure sulphate of quinine, which are to be dried on bibulous paper.