1114. The influence of culture on fruits is not less remarkable. The peach in its wild state, in Medina, is poisonous ; but, cultivated in the plains of Ispahan and Egypt, it becomes one of the most delicious of fruits. The effect of culture on the apple, pear, cherry, plum, and other fruits, is nearly as remarkable; for not only the fruit and leaves, but the general habits of the tree, are altered in these and other species. The history of the migration of fruit-trees has been commenced by Sickler, in a work (Geschichte, &c.) which Humboldt has praised as equally curious and philosophical.