408 FARM AND SCHOOL PROBLEMS. 



5. Define friction, lubrication and wear. 



6. What are bearings, roller bearings, ball bearings? 



7. What is cast iron, chilled cast iron, malleable iron, cast steel, 

 Bessemer steel, wrought iron, tool steel? 



8. Name some of the parts of certain tools in which some of the 

 following varieties of timber are especially adapted: hickory, white oak, 

 ash, maple, poplar, white and yellow pine. Give reasons. 



9. Explain how feed, fuel and wind may be made sources of energy. 



10. What is energy? Explain difference between energy in un- 

 btirned coal and in that of wind? 



11. How does paint preserve the life or durability of wood and iron? 



12. What is rust? How can it be prevented? 



Book References. 



The Farmstead Roberts Macmillan Co., N. Y. 



Physics of Agriculture King, Author, Madison, Wis. 



Agricultural Engineering Davidson Web Pub. Co., St. Paul, Minn. 



Farm Structures Ekblow Macmillan Co., N. Y. 



Grammar of Woodwork Degerton Macmillan Co. 



Educational Woodworking Park Macmillan Co. 



Woodwork and Carpentry King American Book Co., Cincinnati. 



Bulletins. 



Write to U. IS. Department of Agriculture for bulletins on Poultry, 

 Swine and Dairy Equipment and Buildings. Write to your State Ex- 

 periment Station for same. 



