40 Mr. E. Gold : Relation between Periodic Variations of 



the assumed pressure variation is as follows for different 

 latitudes and heights, if the vertical temperature gradient 

 is 6° C, per km. 



T. 



Lat. 







27° C. 







1%2 



25° 



15° 



1-52 



17° 



30° 



1-04 



10° 



45° 



055 



2° 



60° 



048 



-8° 



75° 



0-025 





90° 







Altitude 



092 



•82 



•55 



•29 



•10 



•014 







0-48 

 •43 

 •29 

 •16 

 •05 



•oo: 







5 km. 



025 

 •22 



•15 



■08 



•03 



•003 







o 



013 



o 



0-075 C. 



•12 



•065 



•08 



•042 



•04 



•025 



•013 



•007 



•002 



•001 











The amplitudes for the whole-day wave are given in the 

 following table {vide infra p. 47) : — 



! 



Lat. 



! 







1 



2 



3 



4 



5 km. 



I 



o 

 2-06 







1-29 



0-80 



048 



o 



0-27 



0°15 C. 



! 15° 



1-90 



1-20 



•73 



•44 



•25 



•14 



\ 30° 



146 



0-92 



•56 



•33 



•19 



•11 



: 45° 



093 



0-59 



•36 



•21 



•13 



•07 



; 6o° 



0-43 



0-27 



•17 



•10 



06 



•03 



; 75° 



041 

 



0-07 

 



•05 

 



•03 

 



•02 







•01 

 



90° 



^Returning, to the original equations, we find after substi- 

 tuting for u, v, 10, r in the continuity equation, 



2n[E sin 3 ft-r 2 ] + (2/r-y^t 1 )C i + ^°) -/3^C 2 



, 1 3 to sin ft) __B X 1 di\ + _2A^ 

 r sin ft ~d(f> r l\ Bft r sin ft 



and 

 -2 nr 



+ (2/r- 7 -f 1 )C 2 +^ 2 + /3^G 1 



1 d(B 2 sinft) __ B 2 1 dl\ __ 2A, _ 

 r sin ft dft r r l\ dft r sin ft ~ 



