As a soporific, wool-grease is employed, diluted in two cyathi of wine with a modicum of myrrh, or else mixed with goose-grease and myrtle wine. For a similar purpose also, a cuckoo is attached to the body in a hare's skin, or a young heron's bill to the forehead in an ass's skin: it is thought, too, that the beak alone, steeped in wine, is equally efficacious. On the other hand, a bat's head, dried and worn as an amulet, acts as a preventive of sleep.