556 
PROFESSOR ROSCOE ON THE CHEMICAL INTENSITY OE 
Table I. 
Observations of Chemical Intensity at Kew, July 1866. 
Date. 
Time. 
Chemical 
intensity. 
Sun’s surface. 
Clouds. 
Thermometers Fahr. 
Barometer 
at 32° F. 
Dry. 
Wet. 
1886. 
h m 
July 2. 
9 30 
Rain. 
o 
o 
inches. 
2 30 
0-270 
Light clouds. 
8 
63-7 
54-9 
29*267 
3. 
9 45 
0335 
Clouded over. 
9 
57-1 
51-1 
•384 
2 40 
0-335 
Id. 
9 
59-8 
54-6 
•374 
4 50 
0-227 
Light clouds. 
4 
58'6 
54-5 
•338 
4. 
9 50 
0-430 
Clouded over. 
10 
56-8 
53-8 
•451 
2 45 
0-190 
Id. 
9 
63-5 
55-7 
.477 
4 30 
0-126 
Id. 
9 
60-7 
55-7 
•499 
5. 
9 40 
0-320 
Id. 
6 
60-8 
53-2 
•481 
3 0 
0-355 
Unclouded. 
5 
60-1 
56-4 
•513 
5 0 
0-180 
Clouded over. 
5 
59-7 
52-9 
•524 
6. 
9 30 
Rain. 
4 30 
0-187 
Light clouds. 
4 
60-3 
53-7 
•665 
7. 
9 45 
0-122 
Clouded over. 
8 
57-0 
50-1 
•961 
2 0 
0-143 
Unclouded. 
5 
63-8 
53-7 
30-013 
9. 
9 40 
0-142 
Clouded over. 
10 
63-6 
59*9 
*179 
2 30 
0-315 
Very light clouds. 
5 
72-8 
65-2 
*179 
4 30 
0-160 
Id. 
6 
73-8 
66-0 
•188 
10. 
9 30 
0-390 
Unclouded. 
0 
71*3 
64-7 
•295 
11. 
2 40 
0-165 
Hazy. 
0 
74-8 
66-0 
•265 
4 30 
0-062 
Clouded over. 
9 
75-5 
66-0 
•249 
12. 
9 40 
0-560 
Light haze. 
0 
75-7 
67’5 
•204 
2 40 
0-630 
Unclouded. 
4 
81-1 
69-2 
•151 
5 0 
0-237 
Id. 
1 
82-2 
69*5 
•129 
13. 
9 40 
0-640 
Id. 
0 
78-3 
70-5 
•057 
4 50 
0-280 
Id. 
5 
79-8 
66*5 
•055 
14. 
9 30 
0-380 
Haze. 
4 
69-2 
63*3 
•141 
2 0 
0-550 
Unclouded. 
4 
80-6 
69-6 
•125 
16. 
2 50 
0-177 
Clouded over. 
5 
71-8 
62-0 
•044 
17. 
9 40 
0107 
Id. 
10 
65-9 
58-5 
•050 
2 40 
0-185 
Id. 
9 
68-1 
59‘6 
•012 
4 30 
0-156 
Id. 
10 
65-9 
58*5 
29-997 
18. 
9 50 
0-305 
Light clouds. 
4 
62-4 
55*3 
•996 
2 40 
0-197 
Unclouded. 
3 
68-1 
56-8 
•952 
4 30 
0-177 
Id. 
3 
68-6 
57-4 
•936 
19- 
3 0 
0-185 
Clouded over. 
8 
65-6 
59-0 
•886 
20. 
9 40 
0-257 
Id. 
9 
57-8 
50-6 
30-058 
2 30 
0-355 
Unclouded. 
4 
65-7 
56-8 
•054 
4 30 
0-203 
Id. 
1 
68-7 
58-3 
•036 
21. 
9 40 
0-177 
Unclouded : very thin haze. 
0 
64-2 
58-2 
•095 
2 0 
0-345 
Unclouded. 
1 
75-5 
61-2 
•051 
23. 
9 30 
0-217 
Clouded over. 
10 
56-0 
52-3 
•042 
2 40 
0-280 
Unclouded. 
1 
65-4 
56-7 
29*985 
4 30 
0-237 
Id. 
1 
65-7 
56-9 
•986 
24. 
9 30 
0-247 
Clouded over. 
10 
57-8 
54-1 
30-037 
4 30 
0-089 
Id. 
9 
6l-7 
53-9 
•056 
25. 
9 40 
0-140 
Id. 
9 
58-4 
53-0 
•204 
2 40 
0-187 
Id. 
10 
62-6 
55-9 
•212 
4 30 
0-064 
Id. 
10 
61-5 
55-7 
•217 
26. 
2 30 
0-177 
Id. 
10 
66-6 
58-5 
•083 
4 30 
0-063 
Id. 
10 
64-6 
57-5 
•063 
27- 
9 50 
0-063 
Id. 
10 
61-4 
59-7 
29-823 
2 45 
0-092 
Id. 
10 
63*2 
59-8 
•754 
4 40 
0-088 
Id. 
10 
64-8 
60-8 
*719 
28. 
. 9 30 
0-193 
Id. 
8 
65-2 
59-7 
•654 
1 40 
0-112 
Id.; light rain. 
10 
64-8 
61-1 
•645 
30. 
, 
Rain. 
31, 
' 
Rain. 
