20 Transactions of the South African Philosophical Society. 



m x . u z . n 1 . 



Section XIV. . 1-702 VI. E.... -541 VI. W..., '151 



VII. ... -756 VIII. W. -417 



VIII. E -988 IX. W.... -402; 



IX. E.... 1-201 



Here u z is rather less in IX. W., than it is in VIII. W. — a result, 

 perhaps due to some affinity between these two Sections and Sec- 

 tions I., III. The amplitude in Section III. is considerably less than 

 that of Section I. 



Some of these results take a different aspect if we replace the 

 absolute magnitudes of the first amplitude by the relative magnitudes. 

 We then have — 



u' x . u' x . u\.. 



Section XV. ... 834 Section XII 815 Section X 537 



XIII. . 835 

 XIV... 875 

 IX. E. 951 

 IX.W. 824 

 III.... 767 



X. ... 537 

 XL... 768 

 XIV.. 875 



XI 



768 



VIII. E... 



767 



VIII. W. 



561 



III. 



767 



IV. E. ... 



74 



V.E 



167 



VI. E. ... 



692 



VII 



592 



VIII. E... 



767 



VII 



592 



VI. E. ... 



692 



VI. w. ... 



135 



II 



738 



I 



749 



IV. w. ... 



86 



V. w. ... 



210 



VI. w.... 



135 



VIII. w. 



561 



IX. w.... 



824 



IX. E. ... 951 



Here VI. "W. is again obtrusive. Making due allowance for it, it; 

 seems that there is a slight tendency to an increase inland along the 

 parallels, which, however, is quite overridden by the strong increase 

 inland along the meridians. 



If the amplitudes of the first harmonic term be arranged along the 

 orbit, as was done for the epochs, it appears that the absolute 

 values gradually decrease, with, however, some little irregularity. 

 The relative values, on the other hand, first increase and then 

 decrease : — 



Section XV 2-494 834 



XII 1-815 815 



XIII 2-336 835 



XIV 1-702 875 



IX. E 1-201 951 



