62 SOME OF THE MARKINGS ON JUPITER. 



the drawing was plainly duplex, the dividing line being fairly 

 distinct. The northern edge of this belt was indented, and had 

 two dark and two somewhat diffused white spots. The longitude 

 of these spots changed slightly in the course of a few days. The 

 south edge of this belt was more definite, and shows the deeply 

 indented bay in which lie the remains of the wonderful red 

 spot, now of an ashen grey colour. The body of this belt was of 

 warm chocolate colour. It should be stated that the so-called 

 red spot is now only seen when atmospheric and instrumental 

 conditions are of the best. In 1880 and 1881 this spot was of a 

 brick-red colour. Space does not permit further details of its 

 interesting history. Its form, an elongated oval, has not 

 materially changed since its discovery. Its origin and cause are 

 unsettled matters among astronomers. 



"The North Equatorial belt was also clearly duplex, the 

 dividing line being somewhat broken up, and nearer the southern 

 edge of the belt. On the northern edge of this belt there were 

 four dark spots and four distinct white spots. The dark spot 

 near the centre of the drawing was well defined, and had a 

 proper motion, more rapid than the planet's rotation. The 

 times and other circumstances were taken and seconded. The 

 colour of this belt was similar to that of the South Equatorial 

 belt, with the addition of a decided greenish hue. 



" On the equatorial zone, between these two belts, a faint dark 

 belt, somewhat broken in outline, was clearly perceived when 

 seeing conditions were good. The zone itself was mottled with 

 white markings, which were continually changing in character. 



" The two belts north and south of these principal belts are 

 called the North and South Temperate bands, and at the date of 

 the drawing had no very marked features, though both these 

 bands are frequently covered with well-marked features. 



" The north and south Polar regions were comparatively 

 featureless, except the ringed aspect of the north region, which 

 at the date was fairly well marked. The longitude of the central 

 meridian of this drawing was 32. The date was January ist, 

 9 hours 5 minutes, 1895." 



