136 EFFECTS OF HEAT. 



Q. What are CIRRO-CUM'ULUS CLOUDS ? 



A. When cirrus clouds spring from 

 a massy centre ; or when heavy masses of 

 cloud terminate at their edges in long 

 streaks, or what are called "mares' 

 tails. 11 



A system of small round clouds may be called cirro- 

 cumulus. 



Q. What do CIRRO-CUM'ULUS clouds generally 



FOKEBODE ? 



A. Continued drought, or hot dry 

 weather. 



Q. What are CIRRO-STA'TUS CLOUDS ? 



A. They compose what is generally 

 called a "mackarel sky." This class of 

 clouds always indicate rain and wind; 

 hence the proverb 



" Mackarels' scales and mares' tails 

 Make lofty ships to carry low sails." 



Q. How are COMPOUND CLOUDS sub-divided ? 



A. Compound clouds are also sub- 

 divided into two sorts. 1 . The Cum'ulo- 

 stra'tus; and 2. The Nimbus. 



Q. What is meant by CUMULO-STRA'TUS 

 clouds ? 



A. Those clouds which assume all 



