1. Cumulus of Fine Weather, Li. 



The clouds are scattered and have definite horizontal bases and 

 rounded upper surfaces. The diurnal period of convection is well 

 advanced (3:30 p. m., local time) without much vertical development. 

 The large cloucl in the foreground has its shaded, horizontal base 

 turned toward the observer. Near the horizon the horizontal bases 

 and deflated appearance of the clouds are more clearly shown. (Photo 

 taken at Cheyenne, Wyo., by H. T. Floreen.) 



2. Fractocumulus of Fine Weather, Li. 



The clouds are broken up by the wind. The shadows are light, 

 indicating that the clouds are thin. This form of fractocumulus 

 must not be confused with the fractocumulus of bad weather, L^ 

 (pis. 15 and 16), forming beneath altostratus or nimbostratus, and 

 ig (pis. 22, 23, and 24) which appears below heavy and swelling cumulus 

 or cumulonimbus. (Photo taken at Washington, D. C, by W. J. 

 Humphreys.) 



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