13. Layer of Stratus, L5. 



A uniform layer of stratus is like hioii fog- and often has insufficient 

 contrasts in its light and dark portions to make a good photograph. 

 In this picture the stratus is very low and very uniform. The hill 

 penetrates the cloud layer and shretls of cloud (fractostratus) are 

 visible along the hillside. (Photo at Aberdeen, Scotland, by G. A. 

 Clarke.) 



14. Layer of Stratus (or Stratocumulus), L5. 



Here is a fairly uniform cloud sheet, with some lighter and some 

 darker parts, corresponding rougiily to the rolls of stratocumulus but 

 appearing somewhat larger. Stratus is often a local cloud and when 

 it breaks up the blue sky is seen as is evident toward the horizon in 

 this picture. Sometunes, as in tliis case, there are transitional forms 

 between stratus and stratocumulus but in either case the layer is 

 coded is. (Photo at Rockland, Maine, by J. Oddin.) 



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