INTENSITY OF THE CHEMICAL ACTION OE TOTAL DAYLIGHT. 
673 
July 1st, 1873 (continued). 
Clock. 
Hand. 
Time. 
n. 
Mean 
reading. 
I. 
I 
Time. 
«. 
Mean 
reading. 
I. 
I 
n 
h m f 
5-3 
127 
0-95 
0-179 
h 
m r 
5 
165 
0-43 
0-086 
11 0 a.m. -j 
6-9 
157 
0-59 
0-085 
11 
0a.m. ( 
5 
164 
0-45 
0-090 
9-6 
152 
0-67 
0-070 
1 
10 
142 
0-80 
0-080 
Mean 
0-111 
Mean 
0-085 
Diff. 
+ 0-026 
f 
2-8 
148 
0-74 
0-264 
f 
3 
150 
0-70 
0-233 
12 0 1 
3-6 
127 
0-95 
0-264 
12 
0 1 
3 
145 
0-77 
0-257 
1 
5-3 
119 
1-10 
0-207 
1 
5 
119 
1-10 
0-220 
Mean 
0-245 
Mean 
0-234 
Diff. 
+ 0-011 
f 
2-8 
147 
0-75 
0-268 
f 
3 
145 
0-77 
0-257 
1 0 p.m. \ 
3-6 
140 
0-82 
0-228 
1 
0 p.m. { 
3 
144 
0-78 
0-260 
1 
5-3 
122 
1-00 
0-190 
1 
5 
86 
1-47 
0-294 
Mean 
0-230 
Mean 
0-270 
Diff. 
—0-040 
2 0 „ 
3-6 
122 
1-00 
0-278 
2 
0 „ 
No 
observa 
tions. 
3 0 „ J 
2-8 
163 
0-47 
0-168 
3 
»„{ 
3 
159 
0-56 
0-187 
3-6 
156 
0-61 
0-170 
3 
162 
0-49 
0-163 
Mean 
" 0-169 
Mean 
0-175 
Diff. 
-0-006 
4 0„ { 
9-6 
165 
0-43 
0-045 
4 
o-{ 
10 
149 
0-72 
0-072 
17-1 
127 
0-95 
0-056 
15 
143 
0-79 
0-053 
Mean 
0-051 
Mean 
0-062 
Diff. 
-0-011 
6-9 
162 
0-49 
0-071 
5 
o„{ 
15 
120 
1-06 
0-071 
9-6 
159 
0-56 
0-058 
10 
147 
0-75 
0-075 
Mean 
0-065 
Mean 
0-073 
Diff. 
-0-008 
