19. Cumulus of Fine Weather and Stratocumulus, L^. 



In this photograph there are stratociiniiihis clouds in large soft 

 masses with cumulus clouds below; the latter by themselves would be 

 coded Lx. This combination is coded L^. If the cumidus clouds are 

 sufhciently developed to be coded io or X3 (pis. 20 and 21), the com- 

 bmation of cumulus and stratocumulus shoidd be coded L^,. (Photo 

 by F. W. Backer in the International Atlas.) 



20. Heavy and Swelling Cumulus and Stratocumulus, Lg. 



Here is a layer of stratocumulus with cumulus clouds below. The 

 latter are heaped up and do not penetrate the stratocumulus m this 

 picture but often they do penetrate an existing stratocumulus layer 

 (pi. 21). In some cases, where the layer above is higher, it may be 

 altocumulus derived from cumulus clouds; in that case the altocumulus 

 would be coded il/g (pi. 33) and the cumulus L, or i,, according to 

 circumstances. (Anonymous.) 



56 



