1886.] Sun-spot Areas and Diurnal Declination-ranges. 233 



Toronto 

 Temperature-range, 

 24 days. 



4735 



Prague 

 Declination-range, 

 24 days. 



4795 



Toronto 

 Temperature-range, 

 26 days. 



5293 



Prague 

 Declination-range, 

 26 days. 



6316 



We may conclude from this comparison that, as treated by our 

 method, the declination- ranges and temperature-ranges exhibit 

 Inequalities pretty much of the same magnitude. There is a slight 

 excess of the declination over the temperature for the 26-day In- 

 equalities, but these, being larger, may possibly be influenced by the 

 results of disturbance to a greater extent than those around 24 days. 

 Disturbance would doubtless increase the range. 



Again, while both kinds of Inequalities are very much of the same 

 size, the results of this and of our previous paper lead us to conclude 

 that the one set of Inequalities does not exhibit a closer correspondence 

 with sun-spots than the other, so that as far as our experience goes 

 there is no reason for saying that for short-period solar Inequalities 

 the terrestrial result is more marked in magnetism than in me- 

 teorology. 



15. It is perhaps worth while to exhibit the connexion between the 

 temperature-range and the declination-range Inequalities in the fol- 

 lowing manner (p. 234). 



We have already (Art. 9) mentioned how the Kew temperature- 

 ranges were used by us for setting the Inequalities whose mean result 

 is given in Table V. Now if there be no perceptible physical relation 

 between temperature-range and declination-range, the declination- 

 range Inequalities set by this method should have their corresponding 

 phases distributed at random impartially up and down the paper. In 

 Table YII we have exhibited the individual series representing 

 Prague declination-ranges around 26 days that have been set by this 

 method, only in order to save space we have grouped them into threes 

 (with due regard to phase). It will, we think, be seen from this 

 table that, with comparatively few exceptions, minus numbers are 

 grouped together in the upper part of the table, and plus numbers in 

 the lower. 



The result is thus, in our opinion, in favour of that hypothesis 

 w^hich asserts a physical relationship between the two Inequalities. 



