4 g 0 Dr. Herschel’s Obfervations on the ■ 
ways, are in no manner favourable to this idea. When we 
add alfo, that this ring cafts a deep lhadow upon the planet is 
very Iharply defined both in its outer and inner edge, and m 
bright,, eft etc.ed, the plane, i.felf, it feems to be ataoft 
proved, (hat its confidence cannot be lefs than that o >e 
body of Saturn ; and that confequently, no degree of fluuhty 
can be admitted fofficient to permit a revolving body to keep in 
motion for any confiderable time. 
A groove might afford a paffage, efpecially as on a former 
occafion we have already confidered the idea ot a divided ring. 
A circumftance alfo which feems rather to favour tins idea is, 
that, in fome obfervations, a bright fpot has been feen to pro- 
ied equally on both Tides, as the fatellites have been obferved 
lo do when they pafled behind the ring. But, on the other hand, 
we ought to confider that the fpot has often been obferved very 
near the end of the arms of Saturn’s ring, and that the cal- 
culated diftance is confequently a little too fmall for fuch p- 
pearances, and ought to be 19 or zo feconds at leaft. _We 
Ihould alfo attend to the fize of the fpot, which feems o be 
variable; for it is hardly to be. imagined that a fatell.te, 
brighter than the fixth, and which could be een wit t e 
moon nearly at the full, fhould fo often efcape our notice in its 
frequent revolutions, unlefs it varied much in its apparen 
brightness. ^ ^ anQther argument drawn from the 
number of lucid fpots, which will not agree with the motion 
of one fatellite only; whereas, by admitting a revolution of 
the ring itfelf, in 10 h. 32' <> 4 ? and ^PP ofi »§ a11 th ! 
to adhere to the ring, and to fhare m the fame periodica 
return, provided they laft long enough to be feen many times 
