Animals that are fed on filthy food are not fit for human consumption. Butchers often feed the offal (the insides) of animals to the hogs. This makes the hogs fatten quickly, but it also makes them diseased. When you go to the slaughterhouse with your father, ask him to go around to the back door, and if you see hogs eating this filth, do not buy any more meat from that butcher. =Questions.= 1. What use does the body make of meat? 2. What conditions are essential for good meat? 3. How can meat be kept clean? 4. Why is meat from a diseased animal unfit for food? 5. How can you help in preventing the sale of meat from diseased animals? 6. Why should animals not be fed with offal? =Remember.= 1. Meat that is not handled in a clean manner is sure to contain germs that cause a poison to form in the meat. 2. Never buy meat from a butcher who does not keep his slaughterhouse and butcher shop clean. 3. Meat from a diseased animal is not fit for food. 4. Meat from animals fed on filthy food should not be eaten. 5. Form a "Clean Meat League" and visit the slaughterhouse where your meat is killed. CHAPTER VI CARE OF FOOD--MILK [Sidenote: Value of milk as a food] Milk is another important article of food. The Department of Agriculture at Washington says that milk furnishes sixteen per cent of the nourishment of the people of the country. Milk is an excellent food when it is pure, but when it is not pure it is very dangerous. [Illustration: FIG. 12. A clean dairy.] [Sidenote: Milk as a carrier of germs] Milk has carried the germs of every disease of which the germ is known; it has also carried many diseases of which we do not know the germ. Disease germs grow rapidly in milk, and they do not make the milk look different or taste different from milk that is perfectly pure. If you could take two bottles of milk entirely free from disease germs and put typhoid fever germs in one, and should set both bottles in an ice box for twenty-four hours, you would not then be able to tell into which one you had put the germs. The milk in both bottles would look and taste just the same. The only difference between the milk in the two bottles would be that if you drank from one it would make you stronger and would furnish you with both building material and power-producing material, while if you drank from the other you would become very ill and would probably die. [Sidenote: How disease germs get into milk:] Since we cannot tell from the taste or the appearance of milk whether or not there are disease germs in it, we must take every precaution possible to keep them out. The first step is to learn where the disease germs come from and how they get into the milk. [Illustration: FIG. 13. Polluted milk is sure to come from a dairy where cleanliness is not observed.] [Sidenote: (_1_) By dirt on the cow]