TUBERS and ROOTS follow, and of these the Potato leads the van. Low as you may have noticed their standing on the food-table to be, they are the most economical and valuable of foods, combining as well with others, and as little cloying to the palate, as bread itself. Each pound of potatoes contains seven hundred and seventy grains of carbon, and twenty-four grains of nitrogen; each pound of wheat-flour, two thousand grains of carbon, and one hundred and twenty of nitrogen. But the average cost of the pound of potatoes is but one cent; that of the pound of wheat, four. It is obtainable at all seasons, and thus invaluable as a permanent store, though best in the winter. Spring, the germinating season, diminishes its nutritive value. New potatoes are less nutritious than older ones, and in cooking, if slightly underdone, are said to satisfy the appetite better; this being the reason why the laboring classes prefer them, as they say, "with a bone in them."
In a hundred parts are found but two of nitrogen, eighteen of starch, three of sugar, two-tenths of fat, seven-tenths of saline matter, and seventy-five parts of water. The Sweet-potato, Yam, and Artichoke are all of the same character. Other Tubers, the Turnip, Beet, Carrot, and Parsnip, are in ordinary use. The turnip is nine-tenths water, but possesses some valuable qualities. The beet, though also largely water, has also a good deal of sugar, and is excellent food. Carrots and parsnips are much alike in composition. Carrots are generally rejected as food, but properly cooked are very appetizing, their greatest use, however, being in soups and stews.
HERBACEOUS ARTICLES follow; and, though we are not accustomed to consider Cabbage as an herb, it began existence as cole-wort, a shrub or herb on the south coast of England. Cultivation has developed it into a firm round head; and as a vegetable, abounding as it does in nitrogen, it ranks next to beans as a food. Cauliflower is a very delicate and highly prized form of cabbage, but cabbage itself can be so cooked as to strongly resemble it.
Onions are next in value, being much milder and sweeter when grown in a warm climate, but used chiefly as a flavoring. Lettuce and Celery are especially valuable; the former for salads, the latter to be eaten without dressing though it is excellent cooked. Tomatoes are really a fruit, though eaten as a vegetable, and are of especial value as a cooling food. Egg-plant, cucumbers, &c., all demand space; and so with edible fungi, mushrooms, and truffles, the latter the property of the epicure, and really not so desirable as that fact would indicate.
FRUITS are last in order; and among these stands first of all the apple. While in actual analysis fruits have less nutritive value than vegetables, their acids and salts give to them the power of counteracting the unhealthy states brought about by the long use of dried or salted provisions. They are a corrective also of the many evils arising from profuse meat-eating, the citric acid of lemons and grape-fruit being an antidote to rheumatic and gouty difficulties. Cold storage now enables one to command grapes long after their actual season has ended, and they are invaluable food. The brain-worker is learning to depend more and more on fruit in all its forms; and apples lead the list, containing more solid nutriment than any other form. While considered less digestible raw than baked, they are still one of the most attractive, life-giving forms of food, and if eaten daily would prove a standard antidote to patent medicine. The list of fruits is too long for mention here; but all have their specific uses, and are necessary to perfect health.
SUGAR and HONEY follow in the stores of the vegetable kingdom. Cane-sugar and glucose, or grape-sugar, are the two recognized varieties, though the making of beet-sugar has become an industry here as well as in France. Grape-sugar requires to be used in five times the amount of cane, to secure the same degree of sweetness. Honey also is a food,—a concentrated solution of sugar, mixed with odorous, gummy, and waxy matters. It possesses much the same food value as sugar, and is easily digested.
With the various FARINACEOUS PREPARATIONS, Sago, Tapioca, Arrow-root, &c, the vegetable dietary ends. All are light, digestible foods, principally starchy in character, but with little nutriment unless united with milk or eggs. Their chief use is in the sick-room.
Restricted as comment must be, each topic introduced will well reward study; and the story of each of these varied ingredients in cookery, if well learned, will give one an unsuspected range of thought, and a new sense of the wealth that may be hidden in very common things.