4 Dr. Herschei/s Observations on 
polished, most excellent speculum, I see that the division on 
the ring of Saturn, and the open spaces between the ring and 
the body, are equally dark, and of the same colour with the 
heavens about the planet. 
20-feet reflector. The black division upon the ring is as 
dark as the heavens. It is equally broad on both sides of the 
ring. I see it very steadily, and can trace it a good way to- 
wards Saturn ; both on the part of the ring which is turned 
towards us, and on that which lies the other way. I trace it 
as far as the place where a line, perpendicular to the direction 
of the ring, would touch the inside of the ring, or the outside 
of the open space between the ring and the body of the planet. 
40-feet reflector. I see the division on the ring of Saturn of 
the same colour as the surrounding heavens. It is of an equal 
breadth on both sides, and I can trace it a great way towards 
the body of Saturn. 
20-feet reflector. With a power of 600, I can trace the di- 
vision very nearly as far as the place, where a perpendicular 
to the direction of the ring, would divide the open space be- 
tween the planet and the ring, into two equal parts. 
From these observations, added to what has been given in 
some former papers, I think myself authorized now to say, 
that the planet Saturn has two concentric rings, of unequal 
dimensions and breadth, situated in. one plane, which is pro- 
bably not much inclined to the equator of the planet. These 
rings are at a considerable distance from each other, the 
smallest being much less in diameter at the outside, than the 
largest is at the inside. 
The dimension of the two rings and the intermediate space 
are nearly in the following proportion to each other. 
