22 BULLETIN 592, U. S. DEPARTMENT OF AGRICULTURE. 
Duggar, B. M. Fungous Diseases of Plants. Boston: Ginn & Co., 1909. 
Card, F. W. Bush Fruits. New York: The Macmillan Co., 1914. 
Corbett, L. C. Garden Farming. Boston: Ginr & Co., 1914. 
Goff, E. S. The Principles of Plant Culture. New York: The Macmillan Co., 1916, 
rev. ed. 
Green, S. B. Popular Fruit Growing. St. Paul, Minn.: Webb Pub. Co., 1912, 4. 
ed. rev. 
Green, S. B. Vegetable Gardening. St. Paul, Minn.: Webb Publishing Co., 1914, 
12. ed. rev. 
Kains, M. G. Plant Propagation. New York: Orange Judd Co., 1916. 
Lloyd, J. W. Productive Vegetable Gardening. Philadelphia: J. B. Lippincott 
Co., 1914. 
Lodeman, E. G. The Spraying of Plants. New York: The Macmillan Co., 1910. 
Rexford, E. E. Home Floriculture. New York: Orange Judd Co., 1903. 
,Rolphs, P. H. Subtropical Vegetable Gardening. New York: The Macmillan Co., 
1916. 
Sears, F. C. Productive Orcharding. Philadelphia: J. B. Lippincott Co., 1914. 
Slingerland, M. V., and Crosby, C. R. Fruit Insects. New York: The Macmillan 
Co., 1914. 
Smith, J. B. Economic Entomology. Philadelphia: J. B. Lippincott Co., 1906. 
Watts, R. L. Vegetable Gardening. New York: Orange Judd Co., 1912. 
Waugh, F. A. Landscape Gardening. New York: Orange Judd Co., 1912. 
Weed, C. M. Farm Friends and Farm Foes. Boston: B.C. Heath & Co., 1910. 
White, E. A. Principles of Floriculture. New York: The Macmillan Co., 1915. 
OUTLINE FOR RURAL ENGINEERING— FOURTH YEAR. 
(One-half unit.) 
General references. — How Engineering May Help Farm Life, Yearbook 1915. 
Laboratory Exercises in Farm Mechanics for Agricultural High Schools, Farmers' 
Bulletin 638. 
FARM MACHINERY. 
(24 lessons, 16 exercises.) 
Lesson 1. — Development of Farm Machinery. 
1. History of agriculture in relation to machinery. 
2. Development of particular types. 
3. Status of American farming in relation to machinery. 
Lesson 2. — Relation of Farm Machinery to Management 
1. Equipment in relation to type of farming. 
2. Equipment in relation to size of farm. 
3. Buying machinery. 
Special references. — Minor Articles of Farm Equipment, Bureau of Plant Industry, 
Circular 14. Study of Farm Equipment in Ohio, Bureau of Plant Industry, 
Bulletin 213. 
Lesson 3. — Mechanical Principles. 
1. Definitions of machine, implement, and tool. 
2 Physical principle involved. 
3. Factors of efficiency. 
