“On an island near Brazil a very pleasant tree is said to grow, whose leaves are not unlike those of the Laurel. But if any person should touch ‘a leaf of this tree, and then touch his face and eyes with the hand, he is at once deprived of sight and suffers the severest pains in his eyes. Not far distant, however, there grows another tree, whose leaves, if rubbed over the eyes, restore the eyesight, and remove the pains. “Kircher relates that a wonderful tree is found in the Philippine Islands. Its leaves, facing eastward, are healthy, but those facing westward are poisonous. “Clusius states that in America there is a kind of Larch, which makes men who sleep under its shade so delirious, that when they are awakened, they are out of their minds and assume strange attitudes. Some act like prophets, some like soldiers, some like merchants, everyone for the time being as his natural propensity impels him. “In the bishopric of New Spain, called Antequera, around the valley of Guaxaca, a strange poisonous plant is found which, if given to anyone in food or drink, at once causes death. If it is dried and removed anywhere, according to the time from its being cut, it kills. Thus: if it has been cut for a year, so after a year it causes death; if for a month, then after a month it brings death. “The inhabitants of Macassar in the island of Celebes obtain from a certain tree growing there a most deadly and virulent poison, in which they dip their weapons. So pestiferous is this poisonous tree, that the earth around it for some distance produces neither grass nor vegetable life of any kind. Although instant death may sometimes be avoided by means of antidotes, yet the victim is doomed to die even after a lapse of two or three years. Married men and Mushroom-eaters are more subject to the action of this poison than other people. “_Ophiusa_, in the island of Elephantine, in Ethiopia, has a livid and horrid appearance. If persons drink it they become dreadfully afraid of serpents--so much so, that they commit suicide. Palm wine, however, is said to counteract its influence. “The plant called _Apium risus_ is noxious, through causing those who partake of it to die of excessive laughter. Apuleius says that this is more particularly the case when the herb is taken by a person who has not broken his fast. From the fact that the plant was also known as _Sardonia_ arose the expression “sardonic smile.” People who taste it do not die at once from laughter, but, as Salustius relates, rather from the contraction of the nerves of the lips and the muscles of the mouth; but they appear to die by laughing. “In Bactria and around the Dnieper, a plant called _Gelotophyllis_ is said to grow, which, if it be drunk with wine and myrrh, produces continuous laughter. A similar result is produced by _Arum Ægyptiacum_, when eaten, and by the flowers or seed of the _Datura_.