How sorry we felt when we knew she was so sick. Don't you remember that Uncle John, who is a doctor, told us that she had consumption. Uncle John talked of the poor lady and of the dreadful disease which she has. He called it by two other names, tuberculosis and the "Great White Plague." I'll tell you just what he told me, for Uncle John said that even little children should know about this disease and that they could help to prevent it. He said that a very small plant, so small that we cannot see it with our naked eyes, causes this terrible sickness from which so many, both old and young, die. These plants are so small that a thousand of them could be put on a pin head and still not crowd each other there. These little plants are like tiny rods and are always found in the saliva or spit of a person who has consumption. When Uncle John wants to see them he uses a very powerful magnifying glass called a microscope. You have seen this microscope in Uncle John's office. Long years ago, a great German doctor tried to find out why so many persons, young people and little children, died of this terrible disease. Finally, after long years of study, he found that these tiny plants are the cause of all this disease and sorrow. He also found that these plants are different from the plants in our gardens, for they grow best in dark, damp places where there are warmth and the kind of soil suited to them. These plants never blossom, but they grow and make more plants of the same kind. When father wants to grow more cotton he plants cotton seed, does he not? He always sees that the ground or soil is well prepared for the seed. Our bodies are the soil or ground, and these little rod-like plants are the seed of consumption. Persons who have delicate bodies and who live in damp, dark places, and who do not eat good food furnish the best kind of soil on which these plants will grow. They grow and make more tuberculosis seed just as the cotton grows and makes more cotton seed. Strong, healthy bodies are poor seed ground for consumption seed. They do not grow well but shrink up and die just as cotton seed would if they were planted on stony ground instead of nice mellow earth. You have seen some plants that you were told not to handle or taste because they were poisonous. Well, these little tuberculosis plants that I am telling you about are more poisonous than the plants that you can see. If they get on cups from which you drink, and into your milk or any other food, they may get into your bodies. If you think, I am sure that you will remember some of your friends who have consumption.