on the Planet Saturn, ip 
At 23', I found that the black fpot had advanced a little 
towards the preceding fide. 
At 30% with a power of 300, I found it ftill advancing, 
and faw that the fpot was a little to the north of the equatorial 
belt, but fo that a fmall part of it was upon the belt. 
At 3J 7 , the black fpot was a little more than one-eighth of 
the diameter of Saturn advanced from the following edge 
towards the center. 
At 39', the fatellite was detached. 
At 49', the fpot was advanced fo as to be about one-third of 
its way towards the center; and the fourth fatellite near half 
its own apparent diameter clear of the edge. 
In this fituation of the planet I took an eye-draught of it, (fee 
fig. 10.) as it appeared with the black fpot on the belt ; the lately 
emerged fourth fatellite ; two parallel dark belts, the inter- 
mediate fpace between them and the equatorial one being a little 
brighter than the reft of the difk ; the fixth, third, and fecond 
fatellites on the preceding fide ; the ring projecting like two 
very (lender lines on each fide of the dilk, and containing the 
firft fatellite upon the following arm, with the fifth at a con- 
fiderable diftance following. 
At o h. 5", the black fpot was got a little more than half 
way towards the center. It was much darker than the belt, 
and more upon it than before. 
At 1 h. 2', by advancing gradually towards the fouth, it 
was now almoft intirely drawn upon the equatorial belt. 
At 1 h. 13', the black fpot approached towards a central 
fituation. 
At 1 h. 21' 5i r/ , it was perfectly central, and at the fame 
time upon the middle of the equatorial belt. 
D 2 
I followed 
