Some Besults from the Periodic Formulce. 



123 



Thus, in each case, we have A = 6a^ very nearly ; so that the 

 magnitude of A increases with distance from the sea. 



The values of the angles in the expressions stating the corrections 

 to be applied to the physical formula in order to elicit the co-ordinates 

 in the curve of observed temperatures are given here for reference : — 



A3-/3./2 

 A3-/33/2 

 A4- 184/2 



/3z/2 



/3./2 



iSP 



/V2 



East London. 



91° 7' 

 211 23 

 227 23 

 315 42 



22° 15' 

 69 20 

 47 23 

 61 



Durban. 



94° 



36 



188 



27 



245 



34 



352 



21 



18° 



46 



46 



14 



29 



12 



82 



21 



Umtata. 



99° 



56 



161 



36 



244 



53 



352 



21 



13° 



26 



19 



24 



29 



53 



82 



21 



Queenstown. 



105° 56' 

 319 29 

 101 36 

 311 16 



7° 26' 



2 44 



6 50 



57 34 



The subjoined Tables are these : — - 



Table 1. — Numerical values of 2^,p ^w> <^«> A,„ for pressure, computed 

 from the observed values given in the previous paper re- 

 ferred to. 



Tables 2, 3, 4. — The same for the maximum, minimum, and mean 

 temperatures of selected stations. The averages are only 

 reckoned to the first decimal place, so that the mean tem- 

 perature of a month may not always appear as the exact 

 arithmetical mean of the mean maximum and mean minimum. 

 Such small differences as there are in this respect are respon- 

 sible for the fact that the value of 2^,1 ii^^ Table 4 is not always 

 exactly midway between the values of 2h ^^ Tables 2 and 3. 



Tables 5, 6, 7. — Computed values (a) of pressure, and of tempera- 

 ture for the middle and end of each month, and the difference 

 (c - 0) between the computed and observed mean monthly 

 values of the different elements. The value of vi = indicates 

 the middle of January. 



Table 8. — This has been sufficiently explained on a previous page.* 



* To save space only the final results are given, and not the intermediate steps. 

 The calculations of this nature involve great labour. 



