CHEMICAL INTENSITY OF TOTAL DAYLIGHT IN ECLIPSE OF 1870. 475 
Table VI. 
I 
II. 
III. 
IV. 
V. 
VI. 
VII. 
VIII. 
IX. 
h 
12 
m 
44 
28 
08 
0-100 
0-980 
0-090 
0-090 
0-092 
0-900 
0-961 
12 
54 
27 
34 
0-098 
0-961 
0-077 
0-077 
0-080 
0-786 
0-880 
1 
16 
26 
17 
0-095 
0-931 
0-053 
0-053 
0-057 
0-558 
0-637 
1 
24 
25 
49 
0-093 
0-912 
0-043 
0-043 
0-047 
0-462 
0-534 
2 
2 
22 
35 
0-083 
0-814 
0-000 
0-000 
0-000 
0-000 
0-000 
2 
9 
21 
43 
0-080 
0-784 
0-012 
0-015 
0-151 
0-127 
2 
25 
20 
03 
0-074 
0-725 
0-023 
0-023 
0-032 
0-311 
0-338 
2 
34 
18 
56 
0-072 
0-706 
0-028 
0-028 
0-040 
0-389 
0-498 
2 
44 
17 
42 
0-067 
0-657 
0-035 
0-035 
0-053 
0-522 
0-602 
2 
54 
16 
33 
0-064 
0-626 
0-041 
0-041 
0-065 
0-642 
0-736 
Table VI. (a). 
I 
II. 
III. 
IV. 
V. 
VI. 
VII. 
VIII. 
IX. 
h 
12 
m 
44 
O 
28 
08 
0-053 
0-982 
0-044 
0-056 
0-057 
0-966 
0-961 
12 
54 
27 
34 
0-052 
0-963 
0-066 
0-051 
0-053 
0-898 
0-880 
1 
16 
26 
17 
0-048 
0-889 
0-045 
0 045 
0-051 
0-864 
0-637 
1 
24 
25 
49 
0-047 
0-870 
0 051 
0-037 
0-043 
0-730 
0-534 
2 
2 
22 
35 
0-038 
0-704 
0-000 
0-000 
0-000 
0 000 
0-000 
2 
9 
21 
43 
0-035 
0-648 
0-007 
0-011 
0-186 
0-127 
2 
25 
20 
03 
0-033 
0-611 
0-010 
0-012 
0-020 
0-339 
0-338 
2 
34 
18 
56 
0-029 
0-537 
0-019 
0-020 
0-037 
0-627 
0-498 
2 
44 
17 
42 
0-027 
0-500 
0-022 
0-022 
0-044 
0-745 
0-602 
2 
54 
16 
33 
0-024 
0-444 
0-023 
0-023 
0-052 
0-881 
0-736 
The relation of columns VIII. and IX. is graphically represented in fig. 6, the 
abscissae and ordinates having the same signification as in fig. 5. 
On comparing the curve A, representing the chemical intensity of diffused light, with 
the curve of the solar obscuration, it is seen that the rate of diminution in the chemical 
action exerted by the diffused light is up to a certain point greater than corresponds to 
the portion of sun eclipsed, whilst from this point up to totality the rate of diminution 
becomes less than that corresponding to the progress of the eclipse. As a consequence 
of this fact, and of the law that the diminution in the total photochemical action exerted 
during an eclipse is proportional to the magnitude of the obscuration, it follows that the 
rate of diminution and increase of intensity of the chemically active rays in direct sun- 
light is much slower and quicker than corresponds to the changes of area in the exposed 
portion of the solar disk. This is graphically shown in curve B, fig. 6. The same 
rapid diminution of the chemical action of the diffused daylight during the former 
part of the eclipse was observed at Jamkhandi. It is doubtless due to the dark body 
of the moon cutting off the light from the highly luminous portion of sky lying on one 
side of the sun’s disk. 
That peculiar change of colour which it has long been noticed terrestrial objects 
assume during an eclipse was very strongly marked on the present occasion. Outside 
the garden of the Monastery, and just below our place of observation, was a profusion 
of a variety of Opuntia, on the flat broad leaves of which the change in colour was admi- 
rably depicted. When the obscuration of the solar disk amounted to about one half 
