Computation of certain Harmonic Components. 71 



Substituting for the quantities A, B, 0, D, their values in terms of 

 the series of 73 five-day means, we obtain after reduction the values 

 of the p q coefficients. In the reduced expressions the following 

 symbols are employed : — 



[(0) to (5)] + [(67) to (72)] = 2, [(0)to (5)]-[(67) to(72)]=A 1 . 

 [(6) to (8)] + [(64) to (66)] = 2 3 Corresponding difference =A 2 , 

 [(9)to(ll)] + [(61)to(63)] = S 3 „ „ =A 3 , 



[(12)to(17)] + [(55)to(60)] = 2 4 „ „ =A 4 , 



[(lS)to(23)] + [(49)to(54)] = 2 3 „ „ =A 5 , 



[(24)to(26)] + [(46)to(48)] = 2 6 „ „ =A 6 , 



[(27)to(29)] + [(43)to(45)] = 2 7 „ „ =A 7 , 



[(30)to(35)] + [(36)to(42)] = S 3 „ „ =A 8 . 



[(0)to(3)] + [(69) to (72)] =S 9 , 

 [(5)to(12)] + [(60)to(67)] = 2 10 , 

 [(14) to (21)] + [(51) to (58)] =S n> 

 [(23) to (30)] + [(42) to (49)] = 2 12> 

 [(32) to (35)] + [(37) to (40)] = 2 13 . 



ff „ = («) + (72— »). c„ = («) — (72— »). 



And let (i (T + T_ 1 )-i((0) + (72)))= K, 



then 



45'80753 Pl = (1 - ^ { to 2 4 ] - R s to 2 8 ] } + J( - «r 17 -f 3<r 18 ) 



+ ^ + K-(36), 



45-80753^ = (1— tf){[A 1 to A 8 ]}-|a -i/3, 



- 4572071^ = (l- T V){[2 1 2 2 ]-[2 3 to 2 fi ] + [2 7 2 8 ]} ■ ■ 



+ i {^e - 3<r 8 + 5<r 9 — ^27} + ^ + (36), 



4572071 2i = (l-mi^i ^ AJ-[A 5 to A 8 ]} 

 «=45-57452p 8 = (l-^)^-^ to 2 4 ] + [2 5 to 2 7 ]-2 8 }- 



+ TV{-^9 + 3 ( r 17 -5 < r 5 + 7 < r 6 -9 < T 18 + ll < r3 () } + K-(36), 



/3=45-57452 23 = (l-WMlA to A 3 ]- [A,A 5 ] + [A 6 to A 8 ]} 



+ M^3-^ n -3S +4<5 12 -5£ 24 }, 



