262 Dr. Schuster on 



on different sets of observations. Wherever a repetition 

 was possible, Stewart did not spare any pains to repeat his 

 laborious calculations, but no one was better aware than 

 himself, how much remained to be done in that direction. 

 The following are the results which he deduced from a pre- 

 liminary investigation in which he was assisted by Mr. W. 

 Dodgson. 



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 a Utrecht. 



4. Correcting for these differences of phase, the individual 

 inequalities at Kew, Utrecht, and Toronto are very like the 

 mean of the three and like each other. 



5. Of these, the Kew inequalities are most like the mean, 

 the Toronto least so. 



6. The declination ranges at Kew and Prague exhibit 

 certain common periods which we may regard as the same, 

 or very nearly the same, as the meteorological periods 

 above indicated. 



. 7. Similar magnetic phases appear to occur at Kew 

 about one day before they occur at Prague. 



8. Correcting for this difference of phase, the individual 

 inequalities at Kew and Prague are very like the mean of 

 the two, and like each other. 



9. There is also a less striking likeness between the 

 various magnetical and the corresponding meteorological 

 inequalities. 



10. Provisional sun spot records appear to show certain 

 solar inequalities, very like the magnetic and meteorological 

 inequalities in point of period. 



The connexion between temperature range and sun spot 



