322 



Prof. B. Stewart and W. Dodgson. [Nov. 20, 



years from 1858 to 1867. These we have treated precisely in the 

 method already indicated, that is to say, grouping them in periods of 

 24 days, and obtaining yearly results. The only difference in treat- 

 ment is that we esteemed it superfluous to apply any equalisation to 

 the sun-spot records, as the yearly results were sufficiently marked 

 without this process. 



This has furnished us with the following table, analogous to Table I 

 (see next page) : — 



20. Applying our method to the results of Table XV, we obtain the 

 following numbers : — 



Table XVI. — Exhibiting the Results of our Method applied to 

 Table XV. 



Division 



Magnitude of Sun- 



Division 



Magnitude of Sun- 



from normal. 



spot Inequality. 



from normal. 



spot Inequality. 



-7-0 ... 



10014 



o-o 



9744 



-6-5 .. 



. . . . 10635 



+ -5 



10821 



-6-0 



9288 



+ 1-0 ... 



9322 



-5-5 .. 



7944 



+ 1-5 ... 



6127 



-5-0 



5956 



+ 2-0 ,,. 



5646 



-4 -5 



6177 



+ 2 -5 



8513 



-4-0 



9300 



+ 3-0 



12240 



-3-5 



12035 



+ 3 -5 



13765 



-3-0 .. 



. . . . 12594 



+4 -0 . . . 



15096 



-2-5 



11309 



+4-5 



12140 



-2 -0 



9134 



+ 5-0 ,,. 



9568 



-1 -5 



7403 



+ 5-5 ,., 



6335 



-1 -o 



7790 



+ 6-0 



7054 



-0-5 



7665 







The results of Table XVI are graphically represented in Plate 1, 

 fig. 8. It will be observed that there is a very striking likeness between 

 the solar inequalities and those indicated in meteorology and mag- 

 netism ; but, as we have said before, owing to the imperfection of 

 solar records, this can only be regarded as a provisional result. 



We have not attempted in the meantime to discuss the individual 

 solar inequalities or to represent them in the form of curves. 



21. Let us now endeavour to bring together the various results of 

 our present communication. 



(1.) The temperature-ranges at Kew, Utrecht, and Toronto exhibit 

 certain common periods (around 24 days). 



(2.) Of the curves embodying those periods that of Kew is most 

 like the mean, and that of Toronto least so. 



(3.) Similar phases appear to occur at Toronto 8 days before they 

 occur at Kew, and occur at Kew one day before they occur at Utrecht. 



(4.) Correcting for these differences of phase, the individual in- 



