4. A factor that should not be disregarded in the problem of food is _waste_, and so that the housewife can cope with it properly she should understand the distinction between waste and refuse. These terms are thought by some to mean the same thing and are often confused; but there is a decided difference between them. _Waste_, as applied to food, is something that could be used but is not, whereas _refuse_ is something that is rejected because it is unfit for use. For example, the fat of meat, which is often eaten, is waste if it is thrown away, but potato parings, which are not suitable as food, are refuse.
In connection with the problem of waste, it may be well to know that leakage in the household is due to three causes. The first one is lack of knowledge on the part of the housekeeper as to the difference between waste and refuse and a consequent failure to market well. As an illustration, many housewives will reject turkey at a certain price a pound as being too expensive and, instead, will buy chicken at, say, 5 cents a pound less. In reality, chicken at 5 cents a pound less than the price of turkey is more expensive, because turkey, whose proportion of meat to bone is greater than that of chicken, furnishes more edible material; therefore, in buying chicken, they pay more for refuse in proportion to good material. The second cause for this leakage in the household is excessive waste in the preparation of food for the table, arising from the selection of the wrong cooking method or the lack of skill in cooking; and the third cause is the serving of too large quantities and a consequent waste of food left on individual plates and unfit for any other use in the home.
5. Another matter that constantly confronts the housewife is what foods she shall select for each day's meals. To be successful, all meals should be planned with the idea of making them wholesome and appetizing, giving them variety, and using the left-overs. Every woman should understand that food is cooked for both hygienic and esthetic reasons; that is, it must be made safe and wholesome for health's sake and must satisfy the appetite, which to a considerable degree is mental and, of course, is influenced by the appearance of the food. When the housewife knows how to cook ordinary foods well, she has an excellent foundation from which to obtain variety in the _diet_--by which in these lessons is meant the daily food and drink of any individual, and not something prescribed by a physician for a person who is ill--for then it is simply a matter of putting a little careful thought into the work she is doing in order to get ideas of new ways in which to prepare these same foods and of utilizing foodstuffs she has on hand. However, ample time must always be allowed for the preparation of meals, for no one can expect to produce tasty meals by rushing into the kitchen just before meal time and getting up the easiest thing in the quickest manner. Well-planned meals carefully prepared will stimulate interest in the next day's bill of fare and will prove extremely beneficial to all concerned.