168 G. Jones on the Zodiacal Light. 
rays of the declining sun. The sun may be shining on the bor- 
dering, quite around that cloud; and, if so, it is sending off, 
from every portion of the border, an equally brilliant, silvery 
ig ut our eye is in a position to catch this reflection from 
only one portion of it, and the rest is dull to our vision. If we 
changes of place. So, also, when a rainbow is presented to our 
eye: the myraids of drops of falling water in the whole rain- 
shower are sending off, from each drop, reflections of light in all - 
directions, and the universal atmosphere about us is full of these 
brilliant, variously-colored rays; but only that portion which, to 
us, forms the rainbow-arch, can reach our eye, and all the rest is 
lost to our sight. - 
it is also with the Zodiacal Light; and the proof that we 
ee see the whole of its extent at once, is manifest in the fol- 
owin : 
1. ‘hat when I was ina position north of the ecliptic, the 
main body of the Zodiacal Light was on the northern side of 
_ that line. 
2. When I was south of the ecliptic, the main body of the 
Zodiacal Light was on its southern side. 
3. 
_was equally divided by the ecliptic, or nearly so. 
ie 
ap’ 
‘Tirough July of 1854, the apices, in the evening, were decidedly 
on the northern side of the ecliptic, though my latitude was 
only about 25° N; while, in September of the same year, though 
es! latitude was nearly as before, the apices were on the southern 
side of the ecliptic, as shown by my morning observations; the 
* Which is the ve fe ees 
carta; ‘and why Lefer soften to the onion of the spedaior an regards 
