1323 



zeixj. To the nortli of Batavia, at Pontianak the deflux already shows 

 a northward component, and at Manila deviation to the right is pjreat. 



On the contrary in' July /Sept. defiiix is strong at Batavia and 

 Pontianak, but at Manila tlie drift, though showing less deviation, 

 still has a southward component, which cannot be explained without 

 more data. 



Very evident is in Oct. /Nov. the contrast between the southward 

 deflux at Batavia and the northward one at Manila. 



Attention may be drawn to the fact, that above Batavia the level 

 of strongest deflux (14 — J 5 km.) does not much exceed that of the 

 hiyer where the yearly range of pressure-variation shows a maximum ; 

 by which it is rendered probable that actually the greatest horizontal 

 pressure-gradients occur at that level. 



As further this flow should be considered to be for the greater 

 part a consequence of equatorial rising of the air, it will evidejitly 

 stop or nearly stop at the level, where this rising ends. 



Now the altitude to which convection rises, is the height of the 

 troposphere or of the base of the stratosphere, so that the upper 

 limit of the antitrade will not differ much from the base of the 

 stratosphere. The monthly values found for both, given below, indeed 

 show this connection. 



In the southern summer rising is strongest, extending to higher 



