G. Jones on the Zodiacal Light. 167 
of the observations, about 63 the western horizon, 
bright streak appeared in the western sky, along the ecliptic; 
the joint light from the sun and moon, reflected from the nebu- 
Some of the observations in April, and the great care which I 
took in them to be precise as well as correct, have led me to in- 
Sert them. The unbroken series commences at June 7, 853. 
Tom that time, till our arrival in New York on 22d April, . 
1855, every observation is recorded; and, except on Sunday, I 
hever once failed to have observations, if the moon or clouds did 
not prevent, * x * x * : * 
At this stage of our work, effected and proposed, it may, per- 
aps, seem to be premature to draw conclusions ; but still there 
are certain things that seem to force themselves on the mind 
from the data here afforded; and, if the conclusions which I 
shall now pr to draw are not decisive to the reader's mind, 
a the can at least furnish subjects for discussion that may, in the 
_. &nd, bring us to the truth. ; ; 
It seems to be quite conclusive, on an Inspection of these 
charts, that we never, at any one time, see the whole actual extent of 
Hodiacal Light, This subject can perhaps be elucidated by 
Roticing a common event,—a cloud, silvered at one edge by 
“on gatateh 1854, first quarter at Greenwich, 6d.7h; December 1854, do, 264 
