sutures. In the little infant, the bones are soft and do not unite until it is several months, and sometimes several years old. You will see what a wise provision this is; for small children are continually tumbling, and if these bones were not soft and yielding, they would soon be very much injured.

8. Being of an oval shape, it does not feel the force of blows so much as it would if it had any other shape. As the child becomes older, the bones are firmer and stronger, and give more support.

The skull contains the brain, which I may tell you about at some future time. It is very important that it should be guarded and well taken care of, as we find it is by its hard and firm covering.

9. There are several bones which form the face. The principal ones are the jaw bones, and those around the organs of seeing, smelling, tasting. As I told you

7. What wise provisions do we find in the construction of these bones in children? 8. What good results from its shape? How does age affect the bones? What does the skull contain? How important is the brain? 9. What are the bones of the face? What is the use of the teeth?

in my previous lesson, we have teeth prepared for us to grind or masticate our food.

10. Some of you may think that the teeth are not worthy of our notice; but be very patient, and hear me. They are of as much service, and bear as important a relation to our bodies as any part of our framework; and they are as different in different animals, as the food on which they live. They are composed of bone covered with a very hard substance called enamel. When this decays, or is injured, the tooth is useless for strength.

11. This is sometimes destroyed when the dentist cleans the teeth, by his instruments or acids, which he uses. When the enamel is gone, the beauty and polish of the teeth are gone. The teeth are furnished with little nerves, thought by some to make our food pleasant to our taste.

Sometimes a tooth begins to decay, so that the nerve is exposed to the air, and then we experience acute pain. So tender is the nerve, that if it should be touched by an instrument or pin we could not endure the pain for half an hour. It is not the bone which aches when we say our tooth aches, but this little nerve which troubles us.

12. This nerve is covered by the enamel, and it is this which preserves the tooth sometimes for a hundred years, and even for thousands of years, as in the case of-mummies bodies which have been embalmed, or

How

10. How do some regard the teeth? How should they regard them? Do they differ in different animals? Of what are they composed? important is this enamel ? 11. In what manner is it sometimes injured? What are the results of its decay? With what are the teeth furnished, and for what purpose? What occasions the tooth-ache? 12. How is the nerve protected? How durable is the enamel? What are mummies?

preserved from decay by being washed all over with spices and various substances.

13. Let us examine some of the different kinds of teeth, and see how well they are adapted to the food necessary for different kinds of animals, and different periods in the life of man.

14. Infants live on milk, and need no other nourishment-so they have no teeth. As they become older, their bodies enlarge, and they need firmer bones to support them, and also require more solid food; but their soft gums cannot masticate or chew their bread, and apples, etc. So what do we see? The gums seem to enlarge, and what before was like jelly, makes its appearance, and the little infant has a tooth.

15. You, who have little brothers and sisters, know with what joy the first tooth is welcomed. "Why, baby has a tooth," cries the little prattler; but ah! she does not stop to think for what purpose it was given to her! Then one tooth after another grows, but these you know are only what is called the first set. If we could look inside of the gums we should see the little roots of another set.

16. The first teeth gradually fall out within five oi six years, and then the other set enlarges and appears, to last us through life, if we will only take care of them There have been several instances where the third set grew after the person was forty or fifty years of age.

13. To what are the different kinds of teeth adapted? 14. Why have small infants no teeth? When does a tooth make its appearance? 15. How is the first tooth generally welcomed? How many sets are there? 16 How long does the first set generally last? What takes the place of the first set? How long will the second set last if we take care of them?

I know an old gentleman seventy years of age who has just cut his third set of teeth, but this is an extremely rare occurrence. Every adult person has thirty-two teeth-four cutting teeth in front, six canine, three at each side, and six molar or grinders, three each side

on each jaw. I know an old lady who used to puzzle me very much when I was a child, by telling me that she had not a single tooth in her head, and never had The fact was, all her teeth were large and double—that is, with double roots or prongs; but I never

one.

16. What fact is mentioned respecting a man seventy years old? How many teeth has an adult person? What are they? Do all have both single and double teeth?

heard before of a similar instance, and think it must be very rare.

17. To preserve the beauty of our teeth, and to prevent their troubling us by aching, we must clean them thoroughly with cold water as often as once every day, particularly in the morning, and it would be better if this were done immediately after each meal. It was not intended by our Creator that we should lose our teeth at the age of twenty or thirty, and frequently before that time, or that art should take the place of nature by giving us artificial teeth.

18. Indians and negroes have, almost universally, beautifully white teeth; and they are made of the same materials; the same bone, the same lime forms them that is found in ours. Why then is there this difference? It must be either in the manner their food is prepared, as to heat or cold, or to the care they take of them.

19. Let us look at some of the teeth of different animals. I will first tell you that animals are called either carnivorous, herbivorous, or graminivorous. I will explain to you what these words mean, and then you can understand and always remember them. Those animals are called carnivorous which feed on flesh of other animals, as the lion, bear, tiger, etc. Those which live on grass, herbs, and vegetables, are called herbivorous, as the cow, sheep, etc. The grami

17. How can the beauty of teeth be preserved? Did our Creator intend to give us teeth that would not last us through life? How does art take the place of nature? 18. What kind of teeth have negroes and Indians? Do their teeth differ from ours in quality? In what must the difference consist? 19. Into what three classes are animals divided? What animals are called carnivorous? What animals are called herbivrous? What animals are called graminivorous ?