Sir B. Brodie constantly employed strong nitric acid, in full doses - 30 min. or more - largely diluted, and given in divided doses during the day, for phosphatic and alkaline urine. In cases of chronic cystitis, and even of phosphatic calculus, he also employed local injections containing 1 to 2 min. of the strong acid in the ounce of warm water. The best mode of administering nitric acid under these conditions is to give 5 to 10 min. of the dilute acid in 1 or 2 oz. of decoction of pareira brava every three or four hours.