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The Value of Food (Potential energy in the form)

potential energy, in the form of heat, repair, growth, motion, power to do-in truth, power to live.

The man in control of the engine knows that a coal free from dirt and slate makes a hotter fire, generating more energy with less wear upon the machine itself. The same thing is true about the lubricants; these are chosen very carefully, because foreign substances scratch and wear the metal.

These same things are true with the human machinefood, the fuel, should be chosen with still greater care. In these days of adulterations, it is not always easy for the housekeeper, without a knowledge of chemistry, to know when she is getting a pure food. There is one great remedy for this-buy your supplies from a firm in whom your confidence is well placed. The influence of food upon our lives is much greater than many realize. Being the fuel from which energy is generated, it must be of the right value to furnish sufficient power for our differing needs.

A baby can live entirely upon milk, which is a type of perfect food balance. As activity increases, heavier foods must be eaten, but the same balance must be maintained. Balance means a proper proportion of the five classes of food: nitrogenous, carbohydrates, fats, mineral matter, water. These are the principles contained in all foods. Much pains should be taken to work out a satisfactory diet, because one must manufacture one's own energy; it cannot be given to him, but must be developed from the food eaten.

Proper preparation is the final thing to be considered. No matter how carefully the food materials may be purchased or how thoughtfully the amount of proteid or starch may be proportioned, if the cook fails to combine the materials well and put before one dainty, appetizing dishes, the results will be poor-owing to one's keen appreciation and sympathy. "Let us live well, simply, economically, healthfully and artistically."