FROM ORDINARY DAYS OF THE ELEVEN YEARS 1890 TO 1900. 
265 
mean values obtained for S and for the percentage values of R and Pd in H for the 
two groups appear in Table XLIV. 
Table XLIV.—Percentage H Ranges from Groups of Months of Larger and Smaller 
Sunspot Frequency. 
Year. 
Group of months of largest sunspot 
frequency. 
Group of months of least sunspot 
frequency. 
S. 
R 
per cent. 
R' 
per cent. 
P 
S. 1 K 
per cent. 
R' 
per cent. 
1890 
11-0 
83 
82 
3-1 
73 
67 
1891 
49-2 
108 
104 
22-0 
92 
96 
1892 
81-4 
122 
148 
64-6 
127 
127 
1893 
95-5 
133 
116 
74-4 
129 
114 
1894 
92-6 
131 
138 
63-4 
123 
130 
1895 
70-6 
115 
113 
57-4 
119 
111 
1896 
51-4 
106 
105 
32-2 
92 
108 
1897 
35-3 
96 
89 
17-2 
83 
83 
1898 
34-4 
81 
96 
19-1 
84 
88 
1899 
16-5 
73 
80 
7-7 
87 
83 
1900 
13-2 
75 
66 
5-7 
69 
57 
Mean . . . 
50-1 
102-1 
103-4 
33-3 
98-0 
96-7 
The higher Pd percentage appears in the group of higher values of S in 9 years out 
of the 11. In the two exceptional years, 1896 and 1899, the deficiency in the value 
of R' in the first group is only 3, and so possesses little significance. On the average 
of the eleven years, the excess of the percentage values of Pd in the first group 
amounts to 6'7. If we regard this as a percentage on 60'7y, the mean value of R 
in H for the eleven years, we get 4'0 7 y as corresponding to a difference of 16' 8 in S. 
On a formula of the type Pd = a + b S, this would give 
100 b/a = 0'47. 
In the case of R the higher percentage value is associated with the higher value 
of S in 7 years. In one of the 4 exceptional years, 1899, the deficiency in R is 
substantial, but this possesses less significance than would otherwise be the case from 
the fact that the difference between the values of S for the two groups in that year is 
little over half the average. The excess in the percentage value of R in the group of 
higher values of S, on the average of the 11 years, is 4 1. If we regard this as a 
percentage on 30'7y, the mean value of R in H from the 132 months, we get l'26y 
as corresponding to a difference of 16'8 in S. On a formula of the type R = a + b S, 
this would give 
100 b/a = 0'27. 
