Next to the _Cerealia_ and _Leguminosæ_ may be ranged the oily farinaceous seeds, such as almonds, walnuts, filberts, &c. These abound in starch and mucilage. The use of chocolate, which is prepared from the chocolate nut, growing in the West Indies, ground into a paste, with or without sugar, is in itself a nutritious substance, and to those with whom it agrees, it may be considered as a wholesome nutritious aliment. Yet the vegetable farina, in this state of existence, though highly nutritious, and to many palates very agreeable, is more difficult of digestion, and does not, upon the whole, afford a very wholesome alimentary substance. When too freely used, those kinds of seeds are sure to disagree, more especially if from age the oil has become rancid. They must be considered rather as a delicacy than as fitted to form a portion of our daily food, and with some particular stomachs they never agree. Of the alimentary farinaceous roots, the potatoe, boiled or roasted, is one of the most useful, and perhaps after the _Cerealia_, one of the most wholesome and most nutritious vegetables in common use; its nourishing powers, there can be no doubt, depend upon the amylaceous fecula of which it is chiefly composed. The Jerusalem artichoke deserves likewise to be noticed here, as being a highly alimentary root, chiefly composed of farinaceous matter. Of the fruits rich in farinaceous and mucilaginous matter, few are indigenous. The chesnut, when roasted, affords an alimentary food, but in the East and West Indies the bread fruit, bananas, and the fruit of the plantain tree, are the substitutes for bread. Scarcely any of the various alimentary substances employed by man are consumed in the raw and crude state in which they are presented to us by nature. Almost all of them are previously subjected to some kind of preparation, or change, by which for the most part they are rendered more wholesome and more digestible, and sometimes more nutritive. Accordingly, the observations we have made on the properties of different vegetable aliments, are to be considered as applied to them in the state in which they are commonly used among us. When in the preparation of bread a baking heat is applied to the flour dough, a complete change is produced in the constitution of the mass. The new substance of bread differs materially from flour, it no longer forms a tenacious mass with water, nor can starch and gluten be any more separated from it. By the application of heat to vegetables the more volatile and watery parts are in some cases dissipated. The different principles, according to their peculiar properties, are extracted, softened, dissolved, or coagulated; but most commonly they are changed into new combinations, so as to be no longer distinguishable by the forms and chemical properties which they originally possessed.