It is astonishing with what wonderful self-healing power Nature has endued birds. It is only necessary to clean and cool even severe wounds with a damp sponge and the place will heal of itself, if only care be taken that the patient is kept quiet. In parrots the injuries mostly arise either from more or less severe bites, from chance cuts, or torn wounds, for instance, caused by a projecting piece of wire or a nail. All bites are hard to heal, because they consist of a bruise and tear at the same time. They should be washed with arnica water (7), or, if worse, with Goulard water (11); then smeared with glycerine (25), or lead ointment (10); this is usually sufficient. If the wound is very deep and bleeds much, lint must be laid on it to staunch the bleeding, after it has been carefully cleaned with a sponge dipped in arnica water (7), or it must be smeared with collodion (53). In the worst cases the wound should be sewn surgically, and this is best left to the surgeon or his assistant; collodion (53) should also be put on the wound when it has been sewn up. Great gaping wounds, which cannot be drawn together, especially torn wounds, after being washed with a sponge dipped in arnica water, should be touched with carbolic acid oil (41), or a solution of boric acid (13). Wounds which heal badly, fester much, and break open again and again, must be cleaned once or twice daily with a lukewarm solution of carbolic acid (48), and then brushed over with a liniment composed of thin gum arabic and carbolic acid (59), or boric acid (57). If, after the wound has closed, a swelling remain, the latter should be touched twice daily with spirits of camphor (40).