AT KEW OBSERVATORY, 1890 TO 1900. 
229 
Table XVII.—Ranges. Number of Occurrences in Individual Years. 
Year. 
0' to 
5'. 
5' to 
10'. 
10' to 
15'. 
15' to 
20'. 
20' to 
25'. 
25' to 
30'. 
30' to 
35'. 
35' to 
40'. 
>40'. 
1890 
12 
161 
155 
25 
10 
1 
1 
0 
0 
1891 
16 
77 
157 
69 
29 
5 
5 
5 
2 
1892 
9 
jU 
42 
132 
108 
35 
16 
14 
2 
15 
1893 
5 
47 
124 
132 
37 
11 
6 
2 
1 
1894 
2 
53 
159 
88 
27 
13 
4 
6 
13 
1895 
6 
57 
136 
99 
32 
18 
14 
3 
0 
1896 
14 
71 
157 
61 
34 
15 
5 
4 
5 
1897 
19 
116 
155 
45 
21 
5 
1 
1 
2 
1898 
21 
122 
149 
40 
22 
6 
2 
0 
2 
1899 
35 
123 
147 
39 
10 
6 
2 
9 
—j 
1 
1900 
56 
176 
117 
8 
4 
.2 
2 
0 
0 
Yearly averages— 
'1890 to 1900 
17 
95 
144 
65 
24 
9 
5 
2 
4 
1890, 1899 and 1900 
34 
153 
140 
24 
8 
3 
2 
1 
0-3 
1892 to 1895 
4 
50 
138 
107 
33 
14 
9 
3 
7 
Ranges of from 10' to 15' are about equally numerous in the two classes of years ; 
but ranges over 15' were 44 times as numerous in the representative year of sunspot 
maximum as in the representative year of sunspot minimum, whereas ranges under 
10' were nearly 3^ times as numerous in the representative year of sunspot minimum 
as in the representative year of sunspot maximum. 
Frequency of Occurrence of Maxima and Minima at Different Hours of the Day. 
§ 22. Table XVIII. gives the number of occasions during the 11 years when the 
maximum and minimum for the day fell between 0 and 1 a.m., between 1 and 2 a.m., and 
so on. The times were measured to the nearest minute. An occurrence at an exact 
hour, e.g. at 2h. 0m., was assigned to the following hour, in the case mentioned 2 to 3. 
When, as occasionally happened, two hours had equal claims to a maximum or minimum 
—two measurements agreeing to 0'T—the occurrence was entered as 0’5 under each 
hour. Table XVIII. contains results for the three seasons as well as the whole year. 
Results were really got out for each month, and for the sunspot minimum years 1890, 
1899 and 1900, and the sunspot maximum years 1892 and 1895 separately, as well 
as for the whole 11-year period. The brief abstracts in Tables XIX. and XX. are 
based on these figures. In these tables the numbers represent percentages, whereas 
m Table XVIII. they represent the actual number of occurrences. The total 
occurrences are less in Table XVIII. than in Table XVI., because information was 
lacking as to the exact hours of maximum or minimum on a few days, more especially 
in January. 
