4. (Dr Culverwell.) Nitrate, 20 to 30 gr.; water, 1 fl. oz.

5. (Dr Jewell.) Nitrate, 12 gr.; water, 6 fl. oz.

6. (Ricord.) Nitrate, 8 gr.; water, 1 fl. oz.

7. (West. Hosp.) Nitrate, 112 gr.; diluted nitric acid, 114 minim; distilled water, 1 fl. oz.

Obs. The weaker solutions are used in chronic gonorrhœa, gleet, and leucorrhœa; those of an intermediate strength to prevent an attack of gonorrhœa following the incipient symptoms of that disease; and the strongest, chiefly in spermatorrhœa. Their use requires great caution.

Injection of Oak Bark. Syn. Injectio quercus. Prep. (Univ. Hosp.) Alum, 6 gr.; decoction of oak bark, 1 fl. oz. For the vagina. Astringent.

Injection, Oleaginous. Syn. Injectio oleosa. Prep. Oil of almonds, 4 oz.; liquid subacetate of lead, 8 drops.

Injection of O′′pium. Syn. Injectio opii, I. opiata, L. Prep. 1. Tincture of opium or wine of opium, 1 to 2 fl. dr. (according to circumstances); water, 5 fl. oz. As an anodyne, in gonorrhœa.

2. (Foy.) Extract of opium, 6 gr.; extract of belladonna, 112 dr.; decoction of wild lettuce, 16 fl. oz. In neuralgia and hæmorrhages.

Injection of Opium with Lead. (Wendt.) Syn. Injectio plumbi opiata. Prep. Extract of opium, 112 gr.; distilled water, 2 oz.; mucilage, 2 dr.; liquid subacetate of lead, 4 drops.