The nerve of sight can not bear too bright a light. It asks to have the pupil made small, and even the eyelid curtains put down, when the light is too strong. Once, there was a boy who said boastfully to his playmates: "Let us see which of us can look straight at the sun for the longest time." Then they foolishly began to look at the sun. The delicate nerves of sight felt a sharp pain, and begged to have the pupils made as small as possible and the eyelid curtains put down. But the foolish boys said "No." They were trying to see which would bear it the longest. Great harm was done to the brains as well as eyes of both these boys. The one who looked longest at the sun died in consequence of his foolish act. The second story is about a little boy who tried to turn his eyes to imitate a schoolmate who was cross-eyed. He turned them; but he could not turn them back again. Although he is now a gentleman more than fifty years old and has had much painful work done upon his eyes, the doctors have never been able to set them quite right. You see from the first story, that you must be careful not to give your eyes too much light. But you must also be sure to give them light enough. When one tries to read in the twilight, the little nerve of sight says: "Give me more light; I am hurt, by trying to see in the dark." If you should kill these delicate nerves, no others would ever grow in place of them, and you would never be able to see again. THE EARS. What you call your ears are only pieces of gristle, so curved as to catch the sounds and pass them along to the true ears. These are deeper in the head, where the nerve of hearing is waiting to send an account of each sound to the brain. CARE OF THE EARS. The ear nerve is in less danger than that of the eye. Careless children sometimes put pins into their ears and so break the "drum." That is a very bad thing to do. Use only a soft towel in washing your ears. You should never put any thing hard or sharp into them. I must tell you a short ear story, about my father, when he was a small boy. One day, when playing on the floor, he laid his ear to the crack of the door, to feel the wind blow into it. He was so young that he did not know it was wrong; but the next day he had the earache severely. Although he lived to be an old man, he often had the earache. He thought it began from the time when the wind blew into his ear from under that door. ALCOHOL AND THE SENSES. All this fine work of touching, tasting, seeing, smelling, and hearing, is nerve work. The man who is in the habit of using alcoholic drinks can not touch, taste, see, smell, or hear so well as he ought. His hands tremble, his speech is sometimes thick, and often he can not walk straight. Sometimes, he thinks he sees things when he does not, because his poor nerves are so confused by alcohol that they can not do their work.