These exist usually as combinations with milk proteins, animal proteins, and fat; the most useful are the following: - Virol, made from marrow fat, yolk of egg, egg-shells, malt extract, and lemon juice, is a palatable preparation of considerable nutritive value. The maker's analysis gives the composition as 20 per cent, of fat and 60 per cent, of malt extract. Virvis is a similar preparation of much the same composition. Sanose is a powder consisting of about 80 per cent casein and 20 per cent, of albumose, derived from white of egg. Muffler's food, sold by the Aylesbury Dairy Company, consists of desiccated milk, powdered white of egg, wheaten flour, and lactose. Puro, a meat juice preparation (p. 165), contains much egg albumin. The preparation prepared by Brand, termed Fever food, is most nutritious; it consists of essence of beef, eggs, and cream. In appearance it resembles custard, and has a very agreeable flavour, which is quite distinct from the meaty flavour of the beef juices and extracts.

(4) Proprietary Foods Made From Vegetable Proteins

The chief vegetable protein foods are: - Aleuron, prepared from the proteins of wheat - a white, tasteless, fairly soluble preparation; also Aleuronat, a yellowish-brown powder, almost insoluble in water. These are extremely rich in protein, fairly cheap, and are valuable in the feeding of diabetics. Glidinc, a concentrated protein food is prepared wholly from wheat; it is absolutely free from carbohydrate, and is easily digested and assimilated. Legumtn, a vegetable casein, is made from pulses, and is a useful vegetable protein food. Roborat is made from cereals; it is the most soluble of all the vegetable protein preparations. Tropon and Vegox are two preparations of recent introduction, in which the protein of vegetables is combined with the protein of animals, chiefly fish. They are used chiefly stirred up in thick soups and purees. Further reference is made to proprietary vegetable preparations in the vegetarian section, under Nut meats, and Nut butters (p. 522).