We have only a partial idea at the North of the true character of tropical fruits, since only a small portion of them are of such a nature as to admit of exportation, and such as are forwarded to us must be gathered in an unripe condition in order to survive a short sea-voyage. The orange which we eat in Boston or New York, therefore, is a very different-flavored fruit from the same when partaken of in Havana or Florida. The former has been picked green and ripened on shipboard, as a general thing; the latter was perhaps on the tree an hour before you ate it, ripened under its native skies and upon its parent stem. So of the banana, one of the most delightful and nutritious of all West Indian fruits, which grows everywhere in Cuba with prodigal profuseness,--though we are told that as regards this fruit it is claimed that, like some varieties of our pear, it ripens as well off the tree as on it; and the same is the case with some other fleshy fruits. After the banana has attained its full growth, the final process of ripening commences, as it were, within itself; that is to say, the fruit ceases to depend upon the tree for sustenance or farther development. The pulp becomes gradually sweetened and softened, chiefly by the change of the starch into more or less of soluble sugar. When the bananas are shipped to our Northern markets they are as green as the leaves of the trees on which they grew. Most of us have seen cartloads of them in this condition landing at our city wharves. Placed in an even temperature and in darkness they will ripen and become as yellow as gold in a very few days. The banana and plantain differ from each other much as an apple and a potato differ; the latter should always be cooked before eating, but the former may be either eaten raw or cooked, according to the taste. The banana is gathered at three different stages of its growth. At a quarter of its maturity it is rather milky, and contains much starch. Roasted in ashes, or boiled in water, it forms a very nourishing food, and is a good substitute for bread. If eaten at three fourths of its growth it is less nourishing, but contains more sugar. Lastly, when perfectly ripe, it develops an acrid principle, both wholesome and palatable. The fig banana is a favorite species, and forms a universal dessert in the ripe state with the Creoles. A frequent reference is made to it in these notes because of its importance. The enormous productiveness of the plant and its nutritious character assure to the humble classes an abundant subsistence. People may go freely into the wild lands and find edible bananas at any time, without money and without price. In the cities the charge for them is so moderate that a person must be poor indeed who cannot afford a liberal quantity of them daily.