AGRICULTURE FOR SOUTHERN SCHOOLS. 41 
Lesson 5. — Improvement of Common Stock, 
1. Weeding out unprofitable individuals. 
2. Use of pure-bred sires. 
3. Cooperative breeding. 
4. Cow-testing associations. 
FEEDS AND FEEDING. 
(Nine lessons.) 
References. — 
Farmers' Bulletin 22, The Feeding of Farm Animals. 
The Use of Energy Values in the Computation of Rations for Farm Ani- 
mals, U. S. Dept. of Agr., Bur. An. Indus. Bui. 459. 
Illustrative material : Charts showing feeding standards, etc. ; samples of 
feeds. 
Lesson 1. — Composition of Plants and Animals. 
1. Relation of animals to plants. 
2. Elements and compounds. 
3. Composition of plants. 
4. Composition of animals. 
Lesson 2. — Nutrients. 
1. 
Carbohydrates. 
(a) Nature. 
(&) Sources. 
2. 
Proteids. 
(a) Nature. 
(&) Sources. 
3. 
Fats. 
(a) Nature. 
(&) Sources. 
4. Water and mineral matter. 
Lesson 3. — (a) Digestion. 
1. Nature of the process. 
2. Organs. 
3. Importance of normal function. 
(b) Assimilation, (c) Excretion. 
(Same as for digestion.) 
Lesson 4. — Function of Nutrients. 
1. Carbohydrates. 
2. Proteids. 
3. Fats. 
4. Water and minerals. 
Lesson 5. — Feeding Standards. 
1. The nutritive ratio. 
2. Comparison of standards. 
3. Exercises in determining ratio. 
Lesson 6. — Roughages. 
1. Place in ration. 
2. Classes and composition. 
3. Importance of succulence. 
