152 



Sunspot Variation in Latitude, 1861 — 1902. [Jan. 16, 



What the actual connection between these two different systems 

 of currents is, it is not possible yet to say, but these facts suggest 

 a very close relationship. 



In conclusion, I wish to express my thanks to Mr. T. F. Connolly, 

 computer in the Solar Physics Observatory, for his assistance in 

 making the reductions and drawing the numerous curves. 



Conclusions. 



The result of the investigation leads to the following conclusions : — 



1. Sporer's law of sppt zones is only approximately true, and gives 

 only a very general idea of sunspot circulation. 



2. Sporer's curves are the integrated result of two, three and. 

 sometimes four " spot-activity track " curves, each of the latter falling 

 nearly continuously in latitude. 



3. Sporer's, and many other previous reductions have indicated 

 the peculiar "wavy " nature of the integrated curve, which peculiarity 

 is here shown to be for the most part real and not due to errors of 

 observation, etc. 



4. Outbursts of spots in high latitudes are not restricted simply 

 to the epochs at or about a sunspot minimum, but occur even up to 

 the time of sunspot maximum. 



5. The successive commencement of the " spot-activity tracks " in 

 higher latitudes between a sunspot minimum and maximum seems 

 to be closely related to the " prominence-activity tracks " at the?c 

 periods. 



