226 



NAMES. 



MARE 5 TAIL 



CIRRUS 



27000 to 50.000ft 



CIRRO-STRATUS 



AVERAGE Z9500 ft 

 MACKEREL SKY 



CIRRO-CUMULUS 



10.000 to 25000ft. 



ALTO-CUMULUS 



10.000 to 23000 ft. 



ALTO-STRATUS 



10.000 to 23 000 ft. 



STRATO-CUMULUS 



ABOUT eSOOft. 



CUMULUS 



4500 toSOOOft 



STORM CLOUD 



CUMULO-NIMBUS 



4500 to 21000ft. 



RAIN CLOUD 



NIMBUS 



3000 to 6400ft 



STRATUS 



O to 3500ft 



THE WEATHER 



TYPICAL FORMS. 



HEIGHT, COMPARISON, 

 OBJECTS 



FIG. 155. Cloud forms, in order of their elevation. 



