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: Ginn & 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, 8. 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, IF. A. Landscape Gardening. New York: Orange Judd Co., 1912. 
Weed, C. M. Farm Friends and Farm Foes. Boston: D. 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.—Felation 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 44. 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. 
