184 DK. C. CHEEE: AN ENQUIRY INTO THE NATURE OF THE RELATIONSHIP 



38. Table XXVI. deals with the mean of the absolute daily ranges for the year, 

 and with the ranges and the sums of the 24 differences in the mean diurnal 

 inequalities for the year. The grouping of the years is the same as for the previous 

 table. The values of a, b, and l>/a for the yearly mean of the absolute daily ranges 

 do not agree quite so closely with the corresponding means of the 12 monthly 

 values in Table XXV. as was the case at Katharinenburg (cf. Tables XIII. and XIV.). 



In H the values of a and b for the absolute daily range are about double those for 

 the range of the diurnal inequality ; in D and V the differences between the two sets 

 of values are smaller, but still considerable. In all three elements the values of b/a 

 for the two species of ranges are fairly similar. 



In the case of the mean diurnal inequality in D, the values of b are lower even 

 than those given in Table XIX. for Batavia, and the values of b/a are the lowest we 

 have yet met with. The values of b for the ranges of the mean diurnal inequalities 

 in H and V are much lower than at Batavia, but the values of b/a at the two places 

 are fairly similar. 



The values of b/a for the 24 differences do not show that decided excess over the 

 values for the ranges that was seen at Kew and Batavia. 



TABLE XXVI. Mauritius (Units 1' for D, ly for H and V). 



39. Table XXVII. gives the differences between observed and calculated mean 

 yearly data at Mauritius. Comparing the figures in the last line of the table with 

 the corresponding figures in Tables IV., VIII. , XV., and XXIII., we conclude that 

 the agreement is not quite so good at Mauritius as at the other stations. The 

 agreement is closest for the mean of the daily declination ranges, where it is very 

 fair ; it is on the whole better for V than for H, which is exceptional. 







