Although the perpetually varying sue-1 
cession of light and shade produced on 
Jupiter by his moons, must be too weak 
to produce any perceptible changes in the 
appearance of the shaded parts of his 
spheres, yet tbe gravitating power which 
his hazing moons must exercise on such 
spheres, may produce on them mazy or 
undulating movements,and,consequently, 
Sequent relative changes of gravity which 
would probably produce changes of weath¬ 
er, which altogether would favor that in¬ 
terpretation of the phenomena of his 
belts which I offer. 
If the belts are (as I understood them 
to be) alternately bright and shaded, like 
the several belts or circles seen at some 
seasons like one or other of Mar’s poles, 
j when presented towards us, then the at¬ 
tendant phenomena are, in a great degree, 
solvable; for by admitting that a portion 
of the sun-shine is reflected from the sev¬ 
eral verges, and that another portion is 
swallowed by the intervening vacant spa¬ 
ces, and that refraction bends our rays of 
vision between and under the spheres, as 
it bends a portion of the rays of the Sun, 
so as to produce the apparent belts of 
comparative shade, then a very complete J 
solution of those wonderful appearances 
seen on that planet (which have hereto¬ 
fore, as I learn, been considered by As¬ 
tronomers, as unaccountable) would be 
afforded. If some sections of both crusts 
of the spheres be formed of water alone, 
and if such portions become occasionally 
transparent, it will afford an additional 
reason for the varying phenomena atten¬ 
ding the appearance of the belts. 
The earth being always near the plane 
of Jupiter’s equator, affords a sufficient 
reason why we can never see the sky and , 
stars between his spheres, as we some¬ 
times do between the spheres of Saturn, 
which occasionally presents one or other 
of his poles more or less obliquely tow¬ 
ards the Earth. 
