Although it is usually classed with vegetables, it more closely resembles fruit. It contains malic acid and a very little oxalic acid, but not enough to be injurious. It also contains one and six-tenths per cent. of albumen, two and five-tenths per cent. of sugar, three-tenths per cent. of fats, one and eight-tenths per cent. of acid, and six-tenths percent, of salts, having a total nutritive value of six and five-tenths per cent.