PEOFESSOE EOSCOE ON THE CHEMICAL INTENSITY OF 
Chemical Intensity of Total Daylight at Para, April 13th, 1866. 
Solar time. 
Chemical 
Condition of solar 
Clouds. 
Temperature ° C. 
Barometer. 
intensity. 
disk. 
1 Pry- 
Wet. 
h m 
millims. 
7 13 
0-336 
Unclouded. 
2 
24-6 
34-0 
763-5 
8 0 
3 
25-8 
24-4 
1 9 30 

0-851 
3 
29-1 
25-9 
10 0 
10 20 
10 45 
0-565 
Clouded. 
7-8 
30-0 
25-9 
11 10 
0-570 
30-0 
26-1 
765-0 
11 20 
Eain. 
8 
30-5 
26-7 
11 35 
1-079 
Sunshine. 
31-4 
27-6 
11 50 
0-980 
7-8 
31-7 
27"2 
12 10 
0-665 
Clouded. 
32-0 
27-2 
12 37 
0-474 
30-9 
27-2 
1 0 
1-080 
Sunshine. 
7 
30-4 
26-9 
1 10 
Rain. 
8 
1 42 
0-210 
Clouded. 
8-9 
CTi 
do 
25-6 
| 1 45 
Thunderstorm. 
2 23 
0-425 
Sunshine cloud. 
8 
26-9 
25-1 
762-0 
2 43 
0-743 
Unclouded. 
Sunshine cloud. 
7-8 
28-2 
25-9 
3 2 
0-420 
28-3 
25-6 
3 15 
0-378 
! 
8 
28-1 
25-3 
3 37 
0-248 
Clouded. 
8 
27-9 
25-3 
4 0 
Heavy rain. 
Chemical Intensity of Total Daylight at Para, April 19th, 1866. 
Chemical 
Condition of solar 
nirmrlc 
Temperature ° C. 
intensity. 
disk. 
U1UUU&. 
Dry. 
Wet. 
h m 
6 50 
0-227 
Clouded. 
5 
24-5 
24-3 
millims. 
766-5 
7 15 
0-333 
Id. 
5 
25-0 
24-4 
7 40 
0-360 
Id. 
5 
25-6 
25-0 
8 0 
0-416 
Id. 
9-10 
26-6 
25-6 
9 25 
0-850 
Unclouded. 
6-7 
28-4 
26-0 
9 49 
0-839 
Id. 
6-7 
30-6 
27-4 
9 52 
0-803 
Id. 
6-7 
30-6 
27-4 
10 30 
0-791 
6-7 
30-9 
27-3 
10 47 
1-266 
Unclouded. 
4-5 
31-8 
27-6 
765-0 
10 49 
1-115 
Id. 
4-5 
31-8 
27-6 
11 25 
0-900 
Id. 
5 
32-6 
27-6 
11 27 
1-050 
Id. 
5 
32-6 
27-6 
12 41 
0-940 
Id. 
3-4 
33-3 
27-8 
1 50 
0-564 
Clouded. 
6-7 
29-1 
26-3 
2 15 
1-000 
6-7 
28-1 
25-6 
762-5 
2 46 
0-739 
9 
29-4 
26-3 
3 10 
3 30 
0-260 
Heavy rain. 
Clouded. 
9-10 
26-2 
25-3 
3 50 
Eain. 
