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576 Preparations and Compositions. Part 111.

Lond.Take of

Myrrh, bruised, four ounces;

Rectified spirit, two pints ;

Water, one pint.Macerate for fourteen days, and strain.

Dub.Take of

Myrrh, bruised, three ounces ;

Proof-spirit of wine, a pint and a half ;

Rectified spirit of wine, half a pint.Digest for seven days, and filter.

Tincture of myrrh is recommended internally as a cardiac,for removing obstructions, particularly those of the uterinevessels, and resisting putrefaction. The dose is from fifteendrops to forty or more. The medicine may perhaps be givenin these cases to advantage; though, with us, it is more com-monly used externally, for cleansing foul ulcers, and promo-ting the exfoliation of carious bones.

Tinctura opii, sive thebaica ; vulgo Laudanum eiqui-

dum. Ed.Tincture of Opium, or Thebaic Tincture, commonly called

Liquid Laudanum.Take of

Opium, two ounces ;Diluted alcohol, two pounds.Digest for seven days, and filter through paper.

Dub.Take of

Hard purified opium, powdered, ten drachms 5

Proof-spirit of wine, one pint.Digest for seven days and strain.

Lond.Take of

Hard opium, powdered, two ounces and a half;

Proof-spirit, two pints.Macerate for fourteen days, and strain.

As these tinctures, on evaporation, furnish the same quanti-ty of extract, they are believed to be of nearly equal strength;but it is to be regretted that they are not so well adapted forkeeping as could be wished ; after some time, a part of the