The Book of Household Management by Mrs. Beeton

put into cold water, and that the pot should be heated gradually; but Liebig, the highest authority on all matters connected with the chemistry of food, has shown that meat so treated loses some of its most nutritious constituents. "If the flesh," says the great chemist, "be introduced into the boiler when the water is in a state of brisk ebullition, and if the boiling be kept up for a few minutes, and the pot then placed in a warm place, so that the temperature of the water is kept at 158° to 165°, we have the united conditions for giving to the flesh the qualities which best fit it for being eaten." When a piece of meat is plunged into boiling water, the albumen which is near the surface immediately coagulates, forming an envelope, which prevents the escape of the internal juice, and most effectually excludes the water, which, by mixing with this juice, would render the meat insipid. Meat treated thus is juicy and well-flavoured, when cooked, as it retains most of its savoury constituents. On the other hand, if the piece of meat be set on the fire with cold water, and this slowly heated to boiling, the flesh undergoes a loss of soluble and nutritious substances, while, as a matter of course, the soup becomes richer in these matters. The albumen is gradually dissolved from the surface to the centre; the fibre loses, more or less, its quality of shortness or tenderness, and becomes hard and tough: the thinner the piece of meat is, the greater is its loss of savoury constituents. In order to obtain well-flavoured and eatable meat, we must relinquish the idea of making good soup from it, as that mode of boiling which yields the best soup gives the driest, toughest, and most vapid meat. Slow boiling whitens the meat; and, we suspect, that it is on this account that it is in such favour with the cooks. The wholesomeness of food is, however, a matter of much greater moment than the appearance it presents on the table. It should be borne in mind, that the whiteness of meat that has been boiled slowly, is produced by the loss of some important alimentary properties.