70 RECENT CHANGES IN THE SURFACE OF JUPITER. 
anything else visible on Jupiter ; it was on the northern side of the 
south equatorial belt, and a little in advance of the red s spot. At 
the time there was a great development of colour — ™” 
belts, and this spot presented a clearly defined disc. It 
again under similar circumstances on October 5, 1878, se peer 
not again until October 11, 1880, when it seemed to have 
into being more brilliant than I had ever seen it before ; it looked 
like some > shining white substance laid on the dark belt, which it 
seemed to cut half in two. With a power of 300 it presented a 
well defined oval shape, the longer axis of which was inclined at 
about 30° to the dark belt, and its north end preceding. 
unusual was it that at first L refused to believe it had an existence 
spot was not visible. I loo ed on Pili arene opportal 
times before clearly ij but I never saw one with a br 
time this spot was seen it had the same relative peat 
There are locaral of these spots on the planet that I a 
watching closely for some time past. They are are all not 
round spots, generally less than a second in diameter. It gi 
an uncommon thing to see their places pene by white + weet 
much larger, and probably of clouds ; and o el novel @ spot 
striking change: it was on September 14, 1878, and es 
seemed to cut the south equatorial ban d alm 
situation was in the same longitude as the following ete 
spot. After I had finished my drawing and was ey oak nd 
disc of the others, and I have never ge it 
believe, because I have not looked at the right time "for 
has the same cloud peculiarities as others where ehich E 5s 
There are some of these cloud-like markings W si eo 
further investigation will prove to be permanent feat 
