The perchloride has been applied, it is said successfully, to the cure of polypus nasi by injections, and by continued contact [Boston Medical and Surgical Journal, 1861). It has been injected also into the substance of tumors, and one case is on record when it was selected for injection into a laryngeal growth, but, a drop of the fluid escaping, sudden death followed from laryngeal spasm (Union Medicale, 1873).