N.E. 



Feet 

 14,000 



12,000 



10.000 



8000 



6000 



4OOO 



200O 



Sea Level 



Upper S.E. air current g \^j 



Bank of cumulus begins 

 'arm at noon. 



Updraught 



Belt or Sea of cumulus begins to form 8 to 9 a.m., 

 disappearing at night. 



Feet 



-1 4. 000 

 -12,000 

 -10,000 



8000 



6OOO 



4000 



2OOO 

 Sea Leuel 



Diagram illustrating the prevailing cloud-formations of Mauna Loa during 



August, 1897. 



