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The Edinburgh new Dispensatory : containing 1. The Elements of pharmaceutical Chemistry ; 2. The Materia Medica; or the natural, pharmaceutical and medical History, or the Substances employed in Medicine ; 3. The pharmaceutical Preparations and Compositions ; including Translations of the Edinburgh Pharmacopoeia published in 1805, of the Dublin Pharmacopoeia in 1807, and of the London Pharmacopoeia in 1815
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1?'4

Materia Medka.

Part II,

urine and lime-water, forming the whole into a pulp, and thendividing it into squares to dry.

Litmus is chiefly used as a dye-stuff, and by chemists as avery valuable test of the presence of uncombined acids. Imust frankly confess my ignorance of the grounds upon whichthe Dublin college have introduced it into their Materia Me-dica. The translator of the Pharmacopoeia merely says, «* It" has been used medicinally with an intention of allaying the" tickling attendant on phthisis, and in hysterical coughs."

LlNUM.

Willd. g. 590. Smith, g. )63. Pentandria Pentagynia. —Nat. ord. Gruinales.

Sp. 1. Willd. Smith. Linum usitatissimum. Ed. Lond. Dub,Common flax.

Off —The seed and oil expressed from the seed.

a) Lini usitatissimi semina. Ed. Lond.LlNI semina. Dub.

b) Lini usitatissimi oleum. Ed.

This valuable annual plant is said to have come originallyfrom those parts of Egypt which are exposed to the inunda-tions of the Nile. It now grows wild in the fields in the southof England, and is cultivated in large quantities. It flowersin July.

Lintseed contains about one-fifth of mucilage, and one-sixthof fixed oil. The mucilage resides entirely in the skin, and isseparated by infusion or decoction. The oil is separated byexpression. It is one of the cheapest fixed oils ; but is gene-rally rancid and nauseous, and unfit for internal use. Thecake which remains after the expression of the oil contains thefarinaceous and mucilaginous part of the seed, and is used infattening cattle, under the name of Oil-cake.

Medical use. —Lintseed is emollient and demulcent. Theentire seeds are used in cataplasms. The infusion is muchemployed as a pectoral drink, and in ardor urinag, nephriticpains, and during the exhibition of corrosive sublimate.

Sp. 26. Willd.; sp. 4. Smith. Linum catharticum. D. L.Purging flax. Mill-mountain.

Off.— Herba. The herb.

This is an annual indigenous plant, found wild on drymeadows and pastures. It flowers from June to August. Itjs extremely bitter. An infusion in water or whey of a hand-

 
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