Exercise 18 (Continued) 



Time Record. 



Step 10. — Allow the birds to enter the house and make sure that every- 

 thing is in readiness for them. 



Note. — This general cleaning should be done at least once each spring 

 and fall and oftener if necessary. 



Leading Questions. — 1. Why is this general cleanuag so important? 



2. Why is the lime slaked with boiling water? 



3. Why is the kerosene used? 



4. What make of disinfectant was used and how much? 



5. How long did it take to clean and disinfect the house? 



6. What was the size of the house and cost per 100 square feet of floor 

 space in material and time? 



7. What three definite objects were accomplished by the use of the 

 above solution? 



8. Under what conditions would you make a general cleaning oftener 

 than twice a year? 



68 



