NATURE-STUDY LESSONS. 181 



6. (a) Examine some particularly large hailstones. If 

 a very large one is found, cut it across. 



{b) Describe the cut face. 



(c) Infer from its form and structure how it has 

 been formed. 



LV.-DEW. 



1. Observe the grass on successive mornings : 

 {a) Near water. 



{b) Away from water. 



2. («) Discover the cause of the dampness on some 



mornings. 

 (J>) Is it present during the day ? 



(c) When does it disappear ? 



(d) Why does it disappear? 

 («) When was it formed ? 

 (/) How was it formed ? 



Such moisture as this is called dew. 



3. («) Is dew formed in greater abundance in a clear 



night or in a cloudy night ? In a calm or in 

 a windy night ? 

 (J?) Try to account for the difference in each case. 



4. (a) Which has the greater amount of dew, the grass 



or the board walk? the painted boards or the 

 unpainted? the lawn or the gravel walk? 

 {b) Account for the difference noted. 



5. During what time of year is dew formed ? 



6. Under what conditions is it formed ? 



7. Examine thick, long grass at noon or during the 

 early afternoon. 



