What makes it move? See! It goes first one way and then the other. True, but it will soon stop, said Webb. But what makes it move? Black iron can’t move itself. Is there wheels in there that moves it like father’s clock? No. It moves by the same force that exists in nature, which is but little understood. We know the fact that it does move, and that is about all we know about it. But it is boxed up tight. The hand can’t touch it, or the wind blow it. But something makes it go. What makes it go? That is a mystery I cannot fully explain myself, but as you progress, you will learn as much about it as I know myself, and I trust much more. There are a great many things in nature that are beyond the comprehension of man, that time and study will generally explain. But it has stopped. It is now perfectly still. What stopped it? Father used to say that if a body was put in motion, it would never stop unless it came in contact with some other body. But nothing has come in contact with it. You are slightly mistaken in that. There is a slight friction on the centre pin. Yet that did not stop the needle. The fact is, the same invisible power that started it, stopped it. But I will explain more about it when you have learned its uses. You will see that on one end is a small copper wire wound around it. That is to balance the needle on the centre pin, and denotes that it is the south end of the needle. The other end always points to the north. How can you know that? asked the boy. Because it always points directly, or nearly directly towards the north star. If the needle gets out of order it will not point to the star. Now turn the compass so that the needle will be directly back of the letter N. Walter did so. I can’t see any star there. Now I see hundreds of them. Which one is the north star? It is a small, twinkling star. It will appear and then disappear. Did your father ever show you the big dipper, or great bear? Oh, I know the big dipper, but I never saw the great bear. They are both one, boy. The two lower stars are called pointers. Look to where they point to, and tell me what you see? I see the small, twinkling star you spoke of. I will never forget that. I suppose that the pointers on the dipper always point the same way, and that I can find the star by looking at the pointers? You are partly right. You can always find the star by following up the pointers, but the dipper changes. It is now south-west of the star. In two months it will be directly under it. Thus it continues to revolve around the star, but the pointers always point towards the star. To adjust the compass and take the sights are simple and easy, and I think you will learn to do it in a few days as well as I can. But you have got to study the books and learn how to calculate the area and angles. Now we will return to camp, and in the morning you can set the compass on a line North, forty-five degrees West.