144 NATURE-STUDY LESSONS. 



5. (a) Examine a common kitchen chair to discover 



the kind of wood used in making it. 

 (3) Why is this wood used ? 



B. The Legs. 



6. («) How many legs has it ? 

 (d) Describe their shape. 



7. Discover the reason for a chair's having four legs, 

 yather than two or three. 



8. («) How are the four legs placed with reference to 



each other and to the seat ? 

 (d) Why are they placed in this order? 



9. How are they joined to the seat ? 



10. (a) Describe the bars connecting the legs, 

 (^) What is their shape ? 

 (c) How are they joined to the legs ? 

 {d) What is the use of these bars ? 



11. Examine other chairs to discover whether they 

 have bars. If they have no bars try to discover the 

 reason. 



These bars are called rails, rounds, or rungs. 



12. How is the strength of the chair affected by rails? 



1 3. (a) Have all chairs legs of the same length ? 



{b) If not, what determines the length of the legs? 



C. The Seat. 



14. {a) Describe the part of the chair to which the 



legs are attached. 



(J?) What is its use ? 



{c) Note and describe different shapes of seats. 



(^) Of what different materials are seats made ? 



(e) With what are seats sometimes covered ? 



(/) Examine the seat of a chair about to be recov- 

 ered and describe what is under the covering. 



