EXTRACTA (Extracts).-The mode of preparation of the different officinal extracts varies greatly in the details, which are chiefly of interest to the pharmacist. It is therefore deemed advisable to refer here to the doses alone, the minuteness or magnitude of which will be a sufficient guide to the practitioner as to the strength of the extract.

EXTRACTA FLUIDA (Fluid extracts).-All the fluid extracts of the U.S. Pharmacopoeia, with one exception, contain 16 troy ounces of the powdered material to 16 fluidounces of the menstruum. Extractum sarsaparilla compositum fluidum contains sassafras and mezereon in addition. Extractum spigelia et sennæ fluidum is a mixture of extractum spigelia fluidum, f3x, with extractum sennæ fluidum, f3vj. The pro

portions in this class of preparations being so definitely and systematically fixed, it will merely be necessary to mention the doses of each.

GLYCERITA (Glycerites). The solvent powers of glycerine are called into requisition in the following officinal preparations. Being externally applied the proportion alone is mentioned in each.

Glyceritum acidi carbolici, Zij to
Oss of glycerine.
Glyceritum acidi gallici, 3ij to Oss
of glycerine.

Glyceritum acidi tannici, Zij to Oss
of glycerine.

Glyceritum picis liquidæ, 3j to Oj of glycerine, alcohol, and water. Glyceritum sodii boratis, Zij to Oss of glycerine.

INFUSA (Infusions).-The usual dose of the infusions is f3ij, or a wineglassful, except infusum digitalis,

whose dose is f3ij, and infusum capsici, whose dose is f3ss. The quantity of the active ingredients is

LINIMENTA (Liniments).-The medical uses of the members of this group are suggested from the officinal names, the effects of each article, when externally applied, being familiar to the physician. They are

LIQUORES (Solutions).-The officinal aqueous solutions are given in the following syllabic list. Distilled water is the solvent.

66

morphiæ sulphatis
plumbi subacetatis

Iron, iiss; nitric acid, v;

in solution 3xxxvj.

tras.

m x xx.

Sulphate of iron, 3xij; sul- Externally

phuric acid, 3j gr. xl; nitric styptic. acid 3j3v; in 13xij of solution.

Sulphate of iron, 3xij; sulphu- Used to ric acid, 3xvij; nitric acid, prepare 3xiv; in Oiss of solution.

the sesquioxide.

Gutta percha, iss; chloro- External
form, xvij; carbonate of use.
lead, 3ij.

Mercury, ij; nitric acid, 3v; To prepare
distilled water, f3vj.

Iodine, gr. xxiiss: iodide of
potassium, gr. xlv; water,
fzj.

Carbonate of magnesium, gr.
ce; citric acid, gr. cccc;
syrup of citric acid, fij; in
13xij of solution.

gr. j to f3j.

citrine

ointment.

mv-x.

Half or the whole of

the con

tents of

the bottle.

f3j-ij.

nal use.

Acetate of lead, 3xvj; oxide For exter

of lead, Zixss; in Oiv of solu-
tion.

plumbi subacetatis f3iij of liq. plumbi subace- For exter

MELLITA (Honeys).—The only officinal preparations made with honey, instead of sugar, are

Mel despumatum. Used in the preparation of mel rosa.

Mel sodii boratis.

Both are employed as mouth washes, or adjuvants to washes for the oral cavity.

MISTURE (Mixtures).-The dose of each of the officinal mixtures in the following list is here given; that of the almond emulsion being ad libitum:—

All of these, except mucilage of tragacanth, are employed on account of their demulcent action, ad libitum, and also externally.

OLEORESINE (Oleoresins).-These preparations, formerly called fluid extracts, are solutions of the waxy and resinous constituents of the drug, produced by passing ether through the powdered drug in a covered displacement apparatus. The doses are

PILULA.-Only two pilular masses are officinal under this

PILULE (Pills).-Brief mention is here made of a variety of formula for pills contained in the Pharmacopoeia.