REGISTRATION OF THE CHEMICAL ACTION OF TOTAL DAYLIGHT. 
627 
Daily Chemical Intensity, Manchester 1864. 
June 16th, 1864. 
Barom.=758‘3 millims 
Mean Temp. Dry bulb 17°‘9. 
„ Wet bulb 12°-9C. 
June 18th, 1864. 
Barom.=761 millims. 
Solar time. 
Chemical 
intensity 
of light. 
Amount 
of cloud. 
Sun’s disk. 
Solar time. 
Chemical 
intensity 
of light. 
Amount 
of cloud. 
Sun’s disk. 
h m 
h m 
6 25 A.M. 
0-039 
Clouded over. 
7 50 A.M. 
0-19 
Unclouded. 
7 0 
0-019 
99 
8 40 
0-30 
99 
7 30 
0-10 
Clouds breaking. 
9 10 
0-19 
Clouds. 
8 0 
0-13 
„ 
9 55 
0-19 
8 30 
0-15 
Light clouds. 
10 45 
0-13 
9 0 
0-13 
Clouded over. 
11 30 
0-19 
99 
9 30 
0-24 
Unclouded. 
12 35 p.m. 
0-33 
Light clouds. 
10 0 
0-38 
„ 
1 30 
0-38 
99 
10 30 
0-29 
„ 
3 0 
0-21 
,, 
11 0 
0-38 
„ 
4 0 
0-22 
Unclouded. 
11 30 
0-35 
„ 
6 30 
0-033 
Clouds. 
12 0 
0-22 
Light cloud. 
8 0 
0-0079 
99 
12 30 p.m. 
0-37 
1 0 
0-31 
June 20th, 1864. 
Mean Temp. Dry bulb 19°-5. 
1 30 
0-26 
„ 
Barom. =763-8 millims. „ 
Wet bulb 15°-9 C. j 
2 0 
0-24 1 
0-23 } 
” 
8 0 A.M. 
0-14 
Light clouds. 
2 30 
0-17 
Clouds. 
8 45 
0-14 
Clouds. 
3 0 
0-13 
Unclouded. 
9 15 
0-099 
99 
3 30 
0-15 
Light clouds. 
9 55 
0-094 
99 
4 0 
0-10 
„ 
10 30 
0-16 
99 
4 30 
0-052 
Clouded over. 
11 0 
0-12 
5 0 
0-045 
„ 
11 30 
0-15 
99 
5 30 
0-087 
Light clouds. 
12 0 
0-13 
99 
7 15 
0-030 
„ 
12 15 p.m. 
0-13 
99 
8 15 
0-010 
„ 
12 45 
0-16 
' 
99 
8 40 
0-0027 
„ 
1 0 
0-15 
99 
0-11 
June 17th, 1864. 
Mean Temp. Dry bulb 20° '5. 
1 O'/ 
2 10 
0-074 
99 
Barom.=760 - 9 millims. 
„ 
Wet bulb 17°T C. 
2 45 
0-075 
,, 
3 15 
0-044 
6 40 A.M. 
0-053 
Clouded over. 
3 50 
0-053 
Clouded over. 
7 10 
0-086 
4 30 
0-031 
7 50 
0-18 
)} 
5 30 
0-030 
Rain. 
8 30 
0-11 
Light clouds. 
7 0 
0-010 
„ 
Q ft 
o. 1 1 
y u 
9 30 
U 11 
0-28 
” 
June 21st, 
, 1864. 
Mean Temp. Dry bulb 16°-1. 
9 55 
0-13 
Clouded over. 
„ 
Wet bulb 11°-1 C. 
10 25 
0-045 
}) 
11 10 
0-15 
}J 
6 40 A.M. 
0-12 
11 40 
0-12 
7 15 
0-13 
Light clouds. 
12 10 p.m. 
0-14 
)} 
7 45 
0-074 
„ 
12 30 
0-14 
8 30 
0-080 
„ 
1 0 
0-35 
9 30 
0-21 
Unclouded. 
1 35 
0-18 
)} 
10 0 
0-27 
Light clouds. 
2 0 
0-12 
10 30 
0-27 
2 40 
0-059 
)} 
11 10 
0-33 
5 
3 10 
0-062 
11 30 
0-29 
Sun shining. 
3 40 
0-027 
12 0 
0-072 
8 
Clouds. 
4 20 
Rain. 
12 30 p.m. 
0*22 
8 
Unclouded. 
