1879.] 



Report to the Committee on Solar Physics. 



119 



r 



Kew. 1858 

 to 1864. 



Trevan- 

 drum. 

 as above. 



(0) 

 -219 



(8) 

 + 158 

 (16) 

 L +91 



(1) 

 -334 



(9) 

 + 224 



(17) 

 4-149 



(?) 

 -357 



(10) 

 + 226 



(18) 

 + 178 



(3) 

 -359 



(11) 

 + 192 



(19) 

 + 190 



(4) 

 -295 



(12) 

 + 128 



(20) 

 + 139 



(5) 

 -162 

 (13) 

 + 43 

 (21) 

 + 80 



(6) 

 —48 

 (14) 

 + 34 

 (22) 



— 95 



(7) 

 + 48 



(15) 

 + 53 



(23) 

 -123 



-217 -224 -215 -206 -226 -247 -233 -213 

 -53 +158 +345 +526 +562 +539 +407 +240 

 + 91 -50 -73 -128 -158 -178 -219 -222 



In the above comparison the inequalities for 7 years are multiplied 

 by V in order to bring them to the same scale with that for 16 years 

 exhibited in Table III. 



In Diagram II, which accompanies this paper, the- Kew declination 

 inequality for 24 days (16 years) is given in fig. I. 



The Kew declination inequality for 24 days (7 years) is given in 

 fig. II, while the Trevandrum declination inequality for 24 days (7 

 years) is exhibited in fig. III. It will be seen that there is a very con- 

 siderable likeness between all the three curves which are of the same 

 type. The Trevandrum inequality is more marked than the corres- 

 ponding Kew one — this may possibly be due to the fact that in the 

 Kew observations the disturbances were eliminated. 



20. Our method has hitherto been applied to magnetic declination- 

 ranges. But if the cause of these inequalities be cosmical and con- 

 nected with our luminary, we might suppose that the meteorological 

 elements of the eaith would also be affected. We have, therefore, 

 taken the Kew diurnal temperature ranges — in other words, the 

 difference between the daily indications of the maximum and minimum 

 thermometers for the same 16 years for which we have declination- 

 ranges, and we have treated these in precisely the manner already 

 described, that is to say, we have grouped these ranges into series of 

 24 days each, and dealt with them as we have dealt with the similar 

 declination series. The results are recorded in the following table : — 



