remedy, gave an equal quantity of violent poison to two dogs, tying a crocodile's tooth round the neck of one, and not round that of the other, and they say that, whilst the latter died in a very few hours, the former recovered by means of the tooth. The Abipones surround the neck of a dog that has been bitten by a serpent with ostrich feathers, and they told me that their ancestors looked upon that as a remedy. The Portugueze extol the _piedra de cobra_, which is of a grey, and sometimes of a black colour, and of various sizes, as the magnet of poisons: for in the same manner that loadstone attracts iron, this stone, when applied to a wound, absorbs all the venom. That it may serve again for the same purpose it is immersed in milk, into which the poison is discharged. The ancient physicians thought garlick an excellent remedy for venomous bites. The efficacy of this plant against poisons was proved by an experiment of my own. A Guarany, as he was working in the garden, was bitten in the foot by a hairy spider, such as I have described, and imprudently neglected to mention the circumstance. The poison beginning to operate, he felt his thigh swell, with pain in the stomach, and suspecting his danger, came to me for advice. I ordered a little beef broth to be boiled with plenty of garlick, which taken by the sick man immediately repressed the poison, the swelling, and the pain. Nor am I averse to the prescription of Dioscorides, who thinks that radish juice should be drunk on these occasions. The ancients have advised washing the hands with the same, to keep off the attacks of serpents. For it appears, both from the authority of physicians and from experience, that not only the juice but the very smell of a radish is of use against serpents. Some bind a live hen, or pigeon, cut open, to the wound, thinking that the poison is absorbed by them. In place of a hen some substitute a kid, or the belly of a goat newly slain. Some wash the wounded part with goat's milk, and they say that a countryman cured a serpent wound in the foot by dipping it often into goat's milk. They also say that cheese made of this milk, when applied to the wound, will have the same effect. To these old remedies America adds new ones, a few of which I will mention. They apply the unripe fruit of the anana, when bruised, to poisoned wounds by way of a cataplasm. The Indian physicians give the herb _taropè_, (which the Spaniards call _contra yerba_, or _higuerilla_, the little fig, because its roots have both the odour and the milk of the fig,) to their patient to eat or drink, to counteract the effects of poisons. The leaves of the herb _mboỹ-caà_ are chewed, and the juice swallowed, whilst part of the chewed leaves are placed on the wound. The _macângua caà_ is celebrated for possessing a virtue of the same kind. This herb is named from the duck _macângua_, which, using its wings as a shield, pursues and kills serpents, but if it be wounded