What to the second?
What is necessary to the perfect development of animals?
Why are seeds valuable for working animals?
What other important use, in animal economy, have proximates of the first class?
Under what circumstances is animal fat decomposed?
The first class of proximates in animals comprise the fat, and like tissues.
The second class form the muscle, hair, gelatine of the bones, etc.
In order that they may be perfectly developed, animals must eat both classes of proximates, and in the proportions required by their natures.
They require the phosphate of lime and other inorganic food which exist in plants.
Seeds are the best adapted to the uses of working animals, because they are rich in all kinds of food required.