Thymol. Thymol. Dose, 1/2 - 2 grs.; 3-12 cgms. A crystalline substance obtained from the volatile oils of Thymus vulgaris, Monarda punctata, and Carum copticum. Large, colourless crystals with the odour of thyme and a pungent aromatic taste. Almost insoluble in water, freely soluble in alcohol.

Incompatibles, spirit of nitrous ether; gives a soft or liquid mass when triturated with, acetanelid, antipyrine, camphor, phenol, chloral, menthol, quinine sulphate, resin, salol.

Thyroideum Siccum. Dry Thyroid. Dose, 3 - 10 grs.; 2 - 6 dgms. A powder prepared from the fresh and healthy thyroid of the sheep.

Liquor Thyroidei. Thyroid Solution. Dose, 5 - 15 min.; 0.3 - 1 c.c. A watery extract of the fresh and healthy thyroid glands of the sheep, containing 0.5% of phenol as a preservative. A pinkish, turbid liquid, entirely free from any odour of putrescence.

Tincture (see Aconitum, Aloe, Arnica, Asafetida, Aurantium Belladonna, Benzoinum, Buchu, Calumba, Camphora, Cannabis Indica, Cantharis, Capsicum, Cardamomum, Cascarilla, Catechu, Chirata, Chloro-formum, Cimicifuga, Cinchona, Cinnamomum, Coccus, Colchicum, Conium, Crocus, Cubeba, Digitalis, Ergota, Ferrum, Gelsemium, Gentiana, Guaiacum, Hamamelis, Hydrastis, Hyoscyamus, Iodum, Jaborandi Jalapa, Kino, Krameria, Lavandula, Limon, Lobelia (etherial), Lupulus, Myrrha, Nux Vomica, Opium, Podophyllum, Prunus Virginiana, Pyre-thrum, Quassia, Quillaia, Quinina, Rheum, Scilla, Senega, Senna, Ser-pentaria, Strammonium, Strophanthus, Sumbul, Balsamum Tolutanum, Valeriana, Zingiber). 30 - 60 min. is the dose of all tinctures except the following: (1) having a dose of 5 - 15 min. Belladonna, Cannabis Indica, Capsicum, Chloroform and Morphine, Coccus, Colchicum, Digitalis, Iron Perchloride, Lobelia, Nux Vomica, Opium, Podophyllum, Squills, Strammonium, Strophanthus; (2) Having a dose of 2 - 5 min. Iodum, Aconite, and Cantharides, the two latter may for a single administration be given in 5 - 15 min. doses.

Tragacantha. A gummy exudation obtained from the stem of Astragulus gummifer, and other species, white or pale yellowish flakes, flattened, thin, irregular and marked on the surface by concentric rings; somewhat translucent, horny, inodorous and almost tasteless. Sparingly soluble in water, but swells into a mass with it.

1Glycerinum Tragacanthæ - 20; Glycerin, 60; Water, 20: by trituration.

1Mucilago Tragacanthæ. - 1.38; Alcohol, 2.25; suspend the former in the alcohol; and add Water to 100.

1Pulvis Tragacanthæ Compositus. Dose, 20 - 60 grs.; 1.2 - 4 c.c. - 16.5; Gum Acacia, 16.5; Starch, 16.5; Sugar, 49.5.

Trinitrin (see Tabellæ Trinitrini p. 98. Liquor p. 72)

Trochisci (see Acidum Benzoicum, Acidum Carbolicum, Acidum Tannicum, Bismuthum, Catechu, Eucalyptus, Ferrum, Guaiacum. Ipecacuanha, Krameria, Morphina, Potassii Chloras, Santoninum, Sodii Bicarbonas, Sulphur.)

The Trochisci, Lozenges, are made with three bases of which the chief constituents are Gum Acacia, Mucilage of Acacia and Sugar. The Simple Basis consists of these ingredients alone, the Fruit Basis contains black current paste as flavouring: the Rose Basis contains Rose Water, and the Tolu Basis, Tincture of Tolu.

Unguenti (see Acidum Boricum, Acidum Carbolicum, Acidum Salicylicum, Aconitina, Rosa, Atropina, Belladonna, Cantharis, Capsicum, Cetaceum, Chrysarobinum, Cocaina, Conium, Creosotum, Eucalyptus, Galla, Plumbum, Hamamelis, Hydrargyrum, Iodum, Iodoformum, Paraffinum, Pix, Plumbum, Potassium, Resina, Staphisagria, Sulphur. Veratrina, Zincum.)

Uvæ Ursi Folia. Bearberry Leaves. The dried leaves of Arctostaphylos Uva-ursi. Yellowish-green coriaceous leaves, about 3/4 inch long, the upper surface glabrous, shining and reticulate, with depressed veinlets, no definite odour but a very astringent taste. The active principle, is a glucoside, arbutin.

Infusum Uvæ Ursi. Dose, 1/2 - 1 fl. oz.: 15 - 30 c.c. - 5; boiling Water, 100.