But your body is too warm. And where do you think it gets its heat from? Starve yourself for a day or two, and you will find this out. You will, under such circumstances, feel colder and colder, as well as getting weaker and weaker. A good nourishing meal on the other hand, will directly make you glow with warmth. Food warms the body, as it furnishes it with strength. There is as much heat produced in your body in a single year, as would be sufficient to turn eleven tons of ice into steam; as much in a single day, as would boil eighty pints of water. Food, then, does three distinct things for the living body, and the living body must be duly fed at proper intervals, in order that three distinct ends may be gained. It keeps the body warm. It maintains it in a state of repair, notwithstanding the wear and tear to which it is exposed while laboring. And it gives it strength and power. Weigh out two pounds of bread and meat, and look at them. The two pounds make no very great show. But eat them, and in the wonderful contrivances of your body, those two pounds of bread and meat will sustain its machinery unwasted during the exertion of a fair day’s work, and in addition to this will supply heat enough to make eighty pints of water boil, and strength enough to lift a ton weight one mile! In order that food may render these important services, it is necessary that it shall be wisely chosen, and no less wisely used. Many men get wasting disease and death out of food, in the place of nourishment, warmth, and vigor. If we were to heap up wet sand in the furnace of the steam engine, instead of coal, fire would be smothered, and the movement of the machinery stopped. If we were to heap up gunpowder there, the whole would be blown into fragments in a moment. Or so again, the fire of the furnace might be extinguished by smothering it with too great an abundance of coal; or it might be allowed to smoulder and die out for want. Exactly in the same way the fire and strength of the living body may be smothered by a too heavy load, or by a bad kind of food. Or it may be fanned into the explosion of destructive inflammation and fever. It is important, therefore, that everyone should know what right food is, and how good food requires to be managed. When I go down to see my friend’s yarn-spinning steam engine, I find that a very great amount of care is bestowed upon its feeding. Only the most suitable coal is supplied for its consumption, and the stoker who feeds it is chosen from among his companion workmen for his judgment, and he is trained to be exceedingly careful, watching its wants, and studying its appetite, so as to give exactly what it can manage, a little and often, never allowing the furnace to be either too hungry or too much gorged.