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Our Surroundings 



fog, and when it condenses into small droplets high in the air, 

 it forms clouds. Clouds are such common things that we should 

 'be able to recognize the more important forms. These are 

 known as cumulus, cirrus, stratus and nimbus. 



Cumulus clouds look like heaps of wool in the sky. They 

 appear in the air about 1000 to 2500 feet above the earth and are 

 commonly seen during the middle part of the day and in the 

 afternoon. They are somewhat irregular in shape. When light 



United State 



NIMBUS CLOUDS ABOVE THE FOG 



The dark gray clouds that bring the rain. 



\\eather Bureau. 



and fleecy and separated into several small masses, they usually 

 indicate fair weather ; but when heavy and marked with rounded 

 tops and large peaks, they are likely to cause showers and are 

 often called thunderheads. 



Cirrus clouds have a light feathery appearance and float in the 

 air at a height of from five to ten miles. In the form of plumes 

 with irregular edges, they commonly indicate an approaching 



