the difference in the world in the way we act, and it makes what we have to learn, not limited to science only, but it has to include more difficult and complicated things like psychology and morality.

Maybe I can't make this article help you, but I remember so well what I wanted to know and how I felt when I was young that I am now going to try. And I will tell you to start out with that there is a great deal that nobody knows yet, in spite of the fact that the human race has been struggling thousands of years to learn.

Life itself is still a mystery, especially human life. Human life, in many respects, is like plant and animal life, but in many ways it is entirely different, and the ways in which it is different are almost more important for us to think about than the ways in which it is similar. In all life, except in the very lowest forms, new life is created by the coming together, in a very close and special way, of the male and female elements. You have studied at school about the plants and you probably have observed certain of the animals, so you know something about what this means if you do not understand it thoroughly.

But what you want to know most of all is just how it is with human beings. You want to know just what this coming together is, how it is done, how it starts the new life, the baby, and how the baby is born. You want to understand the wonderful sex organs, that are different in men and women, what each part is for and how it works.

If you feel very curious and excited and shy about it, don't let yourself be a bit worried or ashamed. Your feelings are quite natural, and most everybody else has felt just the same way at your age. Remember that strong feelings are immensely valuable to us. All we need to do is to steer them in the right direction and keep them well balanced and proportioned.

Now in order to understand something of why this subject stirs us so, we must notice in what ways we human beings are different from the plants and animals. About the lowest form of life is the amoeba. It looks like a little lump of jelly, and it produces its young by merely separating itself in two. One part drifts off from the other part and each becomes a separate live being. There is no male and no female and they didn't know they were doing it. In the plants a higher stage of development is reached: there is the male and the female and they join together, not by coming to each other, or because they know they belong together, but quite unconsciously, with the aid of the bees and other insects and the wind, the male part is carried to the female part—they mix, and at once the seed of a new plant begins to grow.

Then come to the animals. In all higher forms of animal life, the male creature comes to the female creature and himself places within her body the germ which, when it meets the egg which is waiting for it, immediately makes a new life begin to grow. But the animals come together without knowing why. They do it from instinct only, and they do it in what is called the mating season, which is usually in the spring. The mating season happens once a year among most of the higher animals, like birds and wild cattle, but to some animals it comes several times a year like the rabbits, for instance. You doubtless know already that the more highly developed the animal, the longer it takes the young one to grow before it is born, and the longer the period when it is helpless to provide its own food and care.

Now we come to human beings, and see how different they are! They have no regular mating season, and while there is a certain amount of instinct in men and women which tends to bring them together, the sex impulse among highly developed people is far more the result of their feeling of love for each other than mere animal instinct alone. Many of the animals