127 



amplitudes snialler (lian those found for 4, 6.5 — 7 and 9 — 11 km, 

 as may appear from the following summary. 



Coefficients of the semi-diurnal oscillation, calculated and graphically deduced 



(in cm. pro sec). 



Even if above 7 km tlie course of the curves may not be quite 

 reliable and consequently the small deviations as assumed above be 

 somev^^hat flattered, this is not the case below 7 km. Thus the fact 

 that these deviations are so small must partly be explained by the 

 circumstance that the values arrived at for successive levels are not 

 independent of one another, because for the greater part they are 

 based on observations obtained from the same couple of ascensions 

 for a series of successive heights, and it is especially during un- 

 disturbed weather that the E-monsoon current exhibits a fairly 

 amount of homogeneity between 4 and 11 km. 



From the above may further be concluded that the course of the 

 curves according to the heights possesses a certainty more approach- 

 ing the above mentioned A's, but that the curves as a wiiole 

 may have a greater error, i. e. thai they are drawn eitiier too high 

 or too low on the graph. 



Therefore, if their course may be trusted, it can be taken as 



