WATER.
A large part of your body is made of water. So you need, of course, to drink water, and to have it used in preparing your food.
Water comes from the clouds, and is stored up in cisterns or in springs in the ground. From these pipes are laid to lead the water to our houses.
Sometimes, men dig down until they reach a spring, and so make a well from which they can pump the water, or dip it out with a bucket.
Water that has been standing in lead pipes, may have some of the lead mixed with it. Such water would be very likely to poison you, if you drank it.
Impurities are almost sure to soak into a well if it is near a drain or a stable.
If you drink the water from such a well, you may be made very sick by it. It is better to go thirsty, until you can get good water.
A sufficient quantity of pure water to drink is just as important for us, as good food to eat.
We could not drink all the water that our bodies need. We take a large part of it in our food, in fruits and vegetables, and even in beefsteak and bread.