Storekeepers sometimes keep fruit and vegetables out of doors where street dust may blow upon it. This dust is often full of disease germs. Flies may also bring disease germs to the food. If food is kept where dust and flies can get at it, we ought not to buy it.
WHAT WE HAVE LEARNED
1. Food is a mixture of water, albumin, fat, starch or sugar, and minerals.
2. Animal foods, like milk, eggs, and meat, have albumin and fat in the best form.
3. Plant food has albumin and fat, but it has very much starch or sugar. So, taken together with animal food, it makes a complete food.
4. Lime, iron, soda, and salt are found in all foods, but we must add a little more salt to food.
5. Water is found in all food, but we must drink some besides.
6. Dirty water, or water with a taste or smell, is not fit for use.
7. Taste tells us what kind of food to use.
8. Hunger, or the appetite, tells us how much food to use.