It _coagulates_, or curdles, the jelly-like pulp of meat, and the gummy white of the egg, and the sticky gluten of wheat flour, so that they can be ground into tiny pieces between the teeth.
[Illustration: THE KITCHEN SHOULD BE CARED FOR AS ONE OF THE MOST IMPORTANT ROOMS IN THE HOUSE] We could hardly eat the different kinds of grains and meals and flours in proper amounts at all, unless they were cooked; indeed they require much longer and more thorough baking, or boiling, than meats.

The amount of cooking required should always be borne in mind when counting the cost of a diet, as the fuel, time, and labor consumed in cooking vegetable articles of diet often bring up their expense much more nearly to that of meats than the cost of the raw material in the shops would lead us to expect.
Cooking Sterilizes Food.

A third, and probably on the whole, the most valuable and important service rendered by cooking is, that it sterilizes our food and kills any germs, or animal parasites, which may have been in the body of the animal, or in the leaves of the plant, from which it came; or, as is far the commoner and greater danger, may have got on it from dirty or careless handling, or exposure to dust.
While it was undoubtedly the great improvement that cooking makes in the taste of food that first led our ancestors--and probably chiefly induces us--to use the process, it is hardly probable that they would have continued to bear the expense, trouble, and numerous discomforts of cooking, had they not noticed this significant fact: that those families and tribes that had the habit of thoroughly cooking their food, suffered least from diseases of the stomach and intestines, and hence lived longer and survived in greater numbers than the "raw fooders." We are perfectly right in spending a good deal of time, care, and thought on cooking, preparing, and serving our food, for we thus lengthen our lives and diminish our sicknesses.

Civilized man is far healthier than any known "noble savage," in spite of what poets and story-tellers say to the contrary.
The Three Methods of Cooking.

The three[11] chief methods of cooking--_baking_, or roasting; _boiling_, or stewing; and _frying_--have each their advantages as well as disadvantages.