314 Prof. Balfour Stewart and Mr. \V. L. Carpenter. 



But while it is not certain that the sun-spot Inequalities around 

 26 days are phenomena precisely similar to those around 24 days, it 

 would appear that the two sets of solar Inequalities are related to 

 corresponding terrestrial Inequalities as nearly as possible in the same 

 way, any small difference between Tables III and VI being as likely 

 due to insufficient observations as to any physical cause. We may 

 now bring together the results we have obtained as follows : 



a. Sun-spot Inequalities around 24 and 26 days, whether apparent or 

 real, seem to correspond closely in period with terrestrial Ine- 

 qualities as exhibited by the daily temperature-range at Toronto 

 and at Kew. 



ft. While the sun-spot and tlie Kew temperature-range Inequalities 

 present evidence of a single oscillation, the corresponding Toronto 

 temperature-range Inequalities present evidence of a double 

 oscillation. 



7. Setting the Inequalities as we have done, the sun-spot maximum 

 occurs about eight or nine days after one of the Toronto maxima, 

 and the Kew maximum about seven days after the same Toronto 

 maximum. 



&. The proportional oscillation exhibited by the temperature-range 

 Inequalities is much less than that exhibited by the corresponding 

 solar Inequalities. 



It must be borne in mind that the truth of a connexion between 

 celestial and terrestrial phenomena can only be decided by cumulative 

 evidence of various kinds. 



What we claim to have here done is to have given reasons for suppos- 

 ing that there is a correspondence in time-scale and a definite relation 

 in type and phase between sun-spot and temperature-range Inequalities, 



estimating periods with exactness. If we slightly equalise the Inequalities of 

 Tables II and V by taking means of three, we obtain the following result : 



Synodical period 



Chief prominences of the Inequalities of T?T P 81< 



around 24 days. last column with chief Ine q uahtie 



respect to the earth. around ^ d& **' 



24+3 26_ 80 26. t , 



2i+ 8 26_ 44 26. 4 , 



24+.JO 26_ 31 26_,o 



24+.; 26_ M 26_ n 



24 +89 26_ n 26_ u 



*24+ 62 26+ 13 26+,, 



In the above table a difference of one in the significant figures denotes a difference 



of time-scale '0059 of a day, an extremely small amount. 



U 



* This last is beyond the limits of the table. 



