PROBLEMS IN TERRESTRIAL PHYSICS. 



141 



3. A third reason for rejecting the common view is, that at about 

 thirty or thirty-two degrees latitude the current of air from the equator 

 meets a current of air from a polar direction, and the two tend to neu- 

 tralize each other and to bank up the atmosphere in a belt of compara- 

 tive calm where the atmospheric pressure is greater than elsewhere on 

 the globe, and this high pressure tends to culminate in the forenoon, 



Vctfiations from the average JltTno^^heric ^r&ss^ 

 ure at Singapore .neay the eq/vcatoir, hT/houys cf 

 the day and -night. M>a%iTnu7n ^re ssuye , at 9 

 and 10 A.M., Tntniynum at 3 Ji.M>- 



and to augment the conditions causing a movement of the air toward 

 the afternoon at the eastward. Moreover, the movement from the equa- 

 tor is not continuous beyond about latitude thirty-two, either toward 

 the pole or eastward, because not only of its having met the current 

 from a polar direction, but also because, at least at some seasons of 

 the year, a portion of it descends from being an upper current to flow 



