=Uses of the Chafing-dish.= It may be used for broth, stew, soup, and fancy roast, the treatment being exactly the same as with a saucepan or an omelet-pan on a stove. EGGS Eggs, next to milk, are the most valuable form of food for those who are very ill. They contain in excellent proportion most of the elements necessary to nourish the body; but being a concentrated form of food, it is well to associate with them milk or some other liquid, and such starchy foods as bread, potatoes, etc. According to Lawes and Gilbert the composition of egg is as follows: SHELL Carbonate of lime 10.00% { Nitrogenous matter 16.00% { Fatty matter 30.70% YOLK { Saline matter 1.30% { Water 52.00% ------- Total 100.00% { Nitrogenous matter 20.40% WHITE { Saline matter 1.60% { Water 78.00% ------- Total 100.00% A large proportion of both yolk and white is _albumen_.[35] It has been found by experiment (page 25) that when white of egg is subjected to a temperature of 134°-140° Fahr. little white threads appear in it; that if the temperature be increased to 160° Fahr., the whole mass becomes a white, but tender, easily divided substance; that if the heat be raised to 200° Fahr. it loses its tender, jelly-like consistency, and becomes firm and tenacious; and that with continued rise of temperature the toughness increases until at from 300°-350° Fahr. it becomes so hard that it is used as a cement for marble. From these statements it will at once be inferred that the proper cooking temperature of eggs is not that of boiling water, but 52° lower. Eggs cooked the customary three minutes in boiling water will be overdone in the part nearest the shell, and not cooked at all in the center of the yolk, as three minutes is not long enough for the heat to penetrate to that point. The yolk, though not injurious in this condition, is not as palatable as when it is cooked. The condition of the white, however, is of grave importance, as even well persons are sometimes made ill by eating it. It is generally agreed that although albumen will coagulate at a temperature somewhat lower than 160° Fahr., the degree of firmness obtained by exposing it to this temperature is the most desirable for food. Therefore we speak of 160° Fahr. as its _cooking temperature_. An egg cooked ideally would be subjected to that temperature for a sufficient time to allow the heat to penetrate and act upon all portions of it. The time required is half an hour. Cooked according to this method, the white would be opaque and firm, but tender and delicate, the yolk not liquid and lukewarm, but thick and almost firm. The flavor of both is delicious.