Burnt Sponge. Formerly a remedy of high repute in the treatment of Scrofula and Bronchocele. According to Garrod,* Burnt Sponge contains a large amount of Carbon mixed with Carbonate and Sulphate of Lime, Chloride of Sodium and Iron; also from 1 to 2 per cent. of Iodide of Potassium and some Bromide. Preuss found Iodide of Sodium, Bromide of Magnesium, Protoxide of Iron and Phosphate of Lime in Calcined Sponge. Since the discovery of its active principle, Iodine, the latter has generally superseded its use; but in various parts of Europe the Burnt Sponge in substance is still employed, and, it is stated, with much success: it is, indeed, only reasonable to conclude that the Bromine and the Iron which the Sponge contains may give it a superiority over the simple Iodine. Compressed Sponge, as a mechanical remedial agent, has been introduced by Dr. Batchelder. He advocates its use for dilating Strictures of the Urethra and Rectum, Fistulous Passages, Sinuses, &c.; also as an application to Piles, Morbid Growths, Tumours, Varicose Veins, &c. Sponge tents, made of Compressed Sponge, impregnated with wax, for dilating the Os Uteri in cases of Uterine Polypus, &c, have long been in general use. Dose, gr. x. - gr. lx. or more, in electuary or lozenge. 2608. Therapeutic Uses. In Bronchocele, Burnt Sponge, in doses of gr. x. - gr. xxx., thrice daily, was formerly regarded as a sovereign remedy. It was given in the form of electuary or lozenge, and was retained in the mouth until it was dissolved, from the idea that in this manner its influence was more direct and speedy. As an alterative course of Mercury generally accompanied its use, it is difficult to say how far the Sponge contributed to effect the cure. In Scrofulous Affections, it was employed extensively in the same manner; and, although its efficacy is stated to have been great, it has been abandoned in British practice, Iodine being considered more effectual.