224 
Angular Distance 
d. 
h. m. 
Long. 
Lat. 
from Sun. 
o 
o 
o 
9. 
... 8 0 
47 
• * t ••• 
6 N. 
... 87 
12. 
... 7 45 
• •• ^8 ••• 
... 95 
13. 
... 7 20 
... 60 ... 
5 „ 
... 96 
14. 
... 7 50 
61 ... 
^2 » 
... 96 
16. 
... 7 20 
64 
... Va ... 
5 » 
... 97 
19. 
... 7 30 
... 65 ... 
5 „ 
... 95 
Taking the means of these results, we find that at the epoch 
February 14'^ 37“, the apex was 5° 20' north of the 
ecliptic, and at an angular distance from the Sun of 94°*3 ; 
or considerably beyond the orbit of the Earth. 
This great extension of the light merits attention, as 
occurring at a time when the luminous atmosphere of the Sun 
is in a state of great activity ; and if, as some astronomers 
suppose, this mysterious phenomenon is directly connected 
with the Sun, it may reasonably be expected that its extent 
and brilliance, and possibly also its position, will be influenced 
by the agencies which produce the Solar spots and the coarse 
mottling of the Sun’s disc ; and in this view, the Zodiacal 
Light may be regarded as the immediate exciting cause of 
the unusual disturbances of the Earth’s atmosphere, which, 
as Mr. Heelis has very ably shown, generally occur at the 
times of maximum frequency of the Solar spots. 
It is generally supposed that the axis of the cone of light 
lies in the plane of the Sun’s equator, but at the epoch of the 
above observations a prolongation eastward of the longer axis 
of the projected Solar equator would pass to the south of the 
ecliptic at an angle of 2° 30', and would therefore form an 
angle of more than seven degrees with the apparent axis of 
the Zodiacal Light. It may, however, be urged that this 
result is due to the greater visibility of that portion of the 
lenticular mass of light which is nearest to the Earth, and 
which, at the epoch of the observations, was on the north side 
of the plane of the ecliptic. 
