172 DR. C. CHEEK: AN ENQUIRY INTO THE NATURE OF THE RELATIONSHIP 



TABLE XV. Kathavinenburg (Units 1' in D and I, ly in H and V). 

 Observed less Calculated Values. 



Year. 



1890 

 1891 

 1892 

 1893 

 1894 

 1895 

 1896 

 1897 

 1898 

 1899 

 1900 



Mean difference calcu- 

 lated -- observed 

 1 Probable error . 

 Mean value of element 

 Range of element . 

 Mean difference x 100 



mean value 



I'robable error x 100 



range of clement 



24. Table XVI. supplies disturbance data at Katharinenburg, corresponding to 

 tbose given in Table IX. for Pawlowsk. If we compare tbe 11-year means in the 

 two tables we see convincing proof of the remark already made that Pawlowsk is 

 more disturbed than Katharinenburg, the mean ranges in Table IX. being roughly 

 double those in Table XVI. 



The small bracketed figures in Table XVI. have the same significance as those in 

 Table IX. 



According to the mean monthly range probably a better criterion than the 

 annual range 1893 would seem to have been relatively less quiet at Katharinenburg 

 than at Pawlowsk, but it stands much below 1892 and 1894. Whilst, however, all 

 the Pawlowsk data made 1892 more disturbed than 1894, the monthly ranges at 

 Katharinenburg give the first position to 1894. In all the columns 1890 appears as 

 the least disturbed year. The monthly ranges though not the annual ranges 

 assign to 1900 and 1899 the two next lowest places, the same positions as they 

 occupy according to sun-spot frequency. But, as at Pawlowsk, 1895 is less disturbed, 

 and 1898 much more disturbed than they should be if sun-spot frequency were the 

 sole criterion. 



