PART 111.

Preparations from animals.

853

softened by hot water, Gum Arabic in powder, of each fiveounces. First rub the Opium well with the tincture; then addgradually the syrup and the extract; afterwards sprinkle in thepowdered gum arabic,- lastly, dry the mass, and form it intotroches, each weighing ten grains."

These troches are used for the same purposes as the former;and from the opium they contain are more efficacious in allay-ing tickling coufrh. Six troches contain one grain of opium;and from six to ten may be taken in twenty-four hours.

TROCHISCI GUMMOSI, Edin. Gum Troches.

'• Take of Gum Arabic, four parts ; Starch, one part; refinedSugar, twelve parts. Rub the whole to powder, and form itinto a mass with rose water fit for forming troches."

These troches are simple demulcents, and answer sufficientlywell for allaying the tickling irritation of the fauces which ex-cites coughing.

TROCHISCI NITRATIS POTASS^, Edin. Trochesof Nitrate of Potass.

" Take of Nitrate of Potass, one part; refined Sugar, threeparts. Beat them to powder, and form them into a mass fitfor forming troches by means of mucilage of Tragacanth."

These troches afford an agreeable form of taking Nitre inthe dry state; and are useful for cooling the mouth in sali-vations, and in stopping the progress of inflammatory sorethroat, when taken at its commencement. They may also beused as a general refrigerant in fevers, diluting largely duringtheir use. The dose is one or two taken every second or thirdhour.

PRMPARATA EX ANIMALIBUS.

Preparations from Animals.

The substances of this division are few in number, and arenot remedies of much efficacy.

ADEPS PR.EPARATA, Lond. Prepared Lard '.'

" Cut the Fat into small fragments ; then melt it by a gentleheat, and press it through linen."

Adeps Suillus prjeparatus, Dub. Prepared Hog's Lard.

" Let fresh Lard, cut into small pieces, be melted by a mo-derate heat, and strained by pressing it through a linen cloth.

" Lard, which is prepared by the dealers, and is preservedwith salt, is to be melted with twice its weight of boiling water,

1 Adeps Suillse preparata, P. L. 1787.3 i 3