(introduction...)

We have studied how plants reproduce themselves (see Booklet No. 3, page 14).

We shall now study how animals reproduce.

It is very important to study this, in order to improve animal husbandry.

When you have a good knowledge of how animals give birth to their young, of how they reproduce, you can make a better choice of the animals for breeding.

To get a good harvest, a farmer chooses good seed (see Booklet No. 3, page 24).

To get good animals, a farmer chooses good breeding stock.

To get a good harvest, a farmer chooses good varieties of seed (see Booklet No. 3, page 22).

To get good animals, a farmer chooses good breeds.

To understand how animals reproduce, we must study the reproductive organs of the females and males.