3°6 



SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 51 



In general the conditions here presented have led to the follow- 

 ing results: 



(a) "The warming and cooling of the atmosphere are determined 

 principally by the radiation processes at the earth's surface and to a 

 less degree by the analogous processes at the upper boundary sur- 

 faces of the clouds." 



cr o° 0° 0° 



FIG. 41 



20" 



20° 



(b) "The latter processes at the cloud surface will on account 

 of the large evaporation probably be more like those above extensive 

 surfaces of water, especially above the ocean, for which, as yet, no 

 observations are available." 



(c) "Of these two processes the warming cannot make itself 

 felt in the lowest stratum so decidedly as does the cooling, since the 

 warmed air rises and so much the more rapidly in proportion as the 

 diminution of temperature with altitude approaches the limiting 



