48 
agree with those deduced from the Oxford observations 
by Mr. Baxendell, but they very clearly confirm the fact 
that a large amount of solar heat is dispersed in some way, 
and without a corresponding effect upon the thermometer, 
or the difference between the maximum in the sun and the 
maximum in the shade would show a large increase in the 
months of maximum temperature. 
The greatest effect of solar radiation, therefore, appears to 
occur in the spring, and this is in accordance with the very 
rapid growth of vegetation we often see suddenly take 
place in early spring. 
OLD TRAFFORD, MANCHESTER.— SOLAR RADIATION. 
Year. 
January. 
February. 
March. 
Max. 
Bk. Bulb 
in Sun. 
Max. in 
Shade. 
Diff. 
Max. 
Bk. Bulb 
in Sun. 
Max. in 
Shade. 
Diff. 
Max. 
Bk. Bulb 
in Sun. 
Max. in 
Shade. 
Diff. 
o 
o 
6 
o 
0 
6 
o 
o 
O 
1856 
45-4 
43-9 
T 5 
49-1 
46-9 
2-2 
54-6 
48-2 
6-4 
1857 
43 T 
41-7 
1-4 
49-9 
46-4 
3-5 
54-4 
47-7 
6-7 
1858 
49-8 
44-8 
5-0 
47-9 
44-1 
3-8 
563 
50-7 
5-6 
1859 
51 T 
46-0 
5-1 
53-6 
47-4 
6-2 
57-6 
50-8 
6-8 
1860 
46-4 
42-9 
3-5 
47-1 
41-9 
5-2 
54-3 
46-4 
7-9 
1861 
41-3 
40-4 
0-9 
52-2 
46-8 
5-4 
60-4 
49-6 
10-8 
1862 
44-6 
43-2 
1-4 
49-7 
46-3 
3-4 
56-8 
47-9 
8-9 
1863 
55-2 
49-6 
5-6 
62-8 
51-6 
11-2 
1864 
43-4 
41-7 
1-7 
45‘5 
41:6 
3-9 
59-8 
47-9 
11-9 
1865 
43-6 
41-3 
2-3 
46-8 
42-3 
4-5 
57-0 
44-1 
12-9 
1866 
490 
47-3 
1-7 
52-9 
46 4 
6-5 
58-7 
47-6 
111 
Means 
45-77 
43-32 
2-45 
49-90 
45-43 
1 4-47 
57-52 
48-41 
9-11 
April. 
May. 
June. 
1856 
66-3 
55-9 
10-4 
70-6 
59-7 
10-9 
76-4 
64-3 
101 
1857 
65-6 
53-8 
11-8 
75-2 
62-2 
130 
82-6 
73-6 
8-0 
1858 
66-5 
57-9 
8-6 
72-6 
59-5 
13-1 
82-7 
73-8 
8-9 
1859 
61-9 
53-9 
8-0 
79-4 
65-7 
13-7 
83-5 
68-8 
14-7 
1860 
63-0 
54-4 
8-6 
81-7 
65-4 
163 
81-3 
63-9 
17'4 
1861 
72-6 
55-5 
17-1 
73-2 
59-4 
13-8 
86-2 
68-6 
17-6 
1862 
70-8 
56-0 
14-8 
81-2 
62-7 
18-5 
1863 
69-9 
56-2 
13-7 
74-8 
59-5 
15'3 
8 T 4 
65-0 
16-4 
1864 
76-0 
59-0 
170 
81-4 
66-5 
14-9 
81-2 
66-2 
15-0 
1865 
81-5 
63-5 
18-0 
79-3 
65-0 
14-3 
93-0 
72-8 
20-2 
1866 
74-1 
573 
16-8 
82 T 
62-2 
19-9 
88-0 
71-8 
16-2 
Means 
69-84 
56-67 
13-17 
77-37 
62-53 
14-84 
83-63 
68-88 
14-75 
